2×4 Roller Derby (English Wikipedia)

Deadwards, Lisa (1 September 2017). "D1S: #8 2x4 takes revenge on #9 Windy City, 178-135". Derby Central. Retrieved 3 January 2018.
Deadwards, Lisa (2 September 2017). "D1S: #1 Rose City stops #8 2x4, 360-80". Derby Central. Retrieved 3 January 2018.
Deadwards, Lisa (3 September 2017). "D1S: #8 2x4 muscles past #10 Ann Arbor, 255-105". Derby Central. Retrieved 3 January 2018.

ecrg.com

"2017 Big O MVPs". Big O Tournament. Archived from the original on 2017-10-18. Retrieved 2017-10-17.

facebook.com

"Oklahoma City, OK – Oklahoma City Roller... - Oklahoma City Roller Derby | Facebook". www.facebook.com. Retrieved 2017-01-25.

flattrackstats.com

"8/5/16: 2x4 (143) @ No Coast (176) | Roller Derby Stats & Rankings | Flat Track Stats". flattrackstats.com. Retrieved 2017-01-25.
"2x4 Roller Derby | Roller Derby Stats & Rankings | Flat Track Stats". flattrackstats.com. Retrieved 2017-01-25.
"Oklahoma City Roller Derby | Roller Derby Stats & Rankings | Flat Track Stats". flattrackstats.com. Retrieved 2017-01-25.
"9/1/17: Windy City (135) @ 2x4 (178) | Roller Derby Stats & Rankings | Flat Track Stats". flattrackstats.com. Retrieved 2017-10-17.

palermo.edu

fido.palermo.edu

Di Pasqua, Damián (2011). "La imagen del Tango. Identidad, marca y valor del 2x4". Reflexión Académica en Diseño y Comunicación. XV. Buenos Aires, Argentina: Universidad de Palermo: 216. ISSN 1668-1673.

scottishrollerderby.wordpress.com

"Team Argentina-Roller Derby World Cup 2011", Scottish Roller Derby Blog, 12 October 2011

thederbyapex.com

Prime (2017-06-09). "FOOTAGE: The 2x4/Windy City Nail Biter (FIRST HALF)". The Apex. Retrieved 2017-10-17.
Apex, The (2018-01-23). "2x4 and Team Argentina to Embark on the Most Ambitious Trip in the History of Roller Derby 🇦🇷". Medium. Retrieved 2019-09-11.

web.archive.org

"Nuestra Historia Archived 2014-06-05 at the Wayback Machine", 2x4 Roller Derby (in Spanish)
"WFTDA Welcomes 16 Apprentice Members Archived 2013-09-02 at the Wayback Machine", WFTDA, 26 April 2013
"WFTDA Welcomes 26 New Member Leagues - Latest News - Women's Flat Track Derby Association". www.wftda.com. Archived from the original on 2016-01-26. Retrieved 2016-05-04.
"Seattle – WFTDA". wftda.com. Archived from the original on 2017-10-19. Retrieved 2017-10-18.
"Strength Factor Challenge (SFC) Program – WFTDA". wftda.com. Archived from the original on 2017-02-02. Retrieved 2017-01-25.
"2017 Big O MVPs". Big O Tournament. Archived from the original on 2017-10-18. Retrieved 2017-10-17.

wftda.com

stats.wftda.com

Watson, Michael. "Current International WFTDA Rankings". WFTDA Stats Home. Retrieved 2019-10-15.
Watson, Michael. "Sanctioned Results". WFTDA Stats Home. Retrieved 2019-09-11.
Watson, Michael. "No Coast 176 vs 143 2 x 4 on 05 Aug 2016". WFTDA Stats Home. Retrieved 2019-09-11.
Watson, Michael. "Kansas City 140 vs 159 2 x 4 on 06 Aug 2016". WFTDA Stats Home. Retrieved 2019-09-11.
Watson, Michael. "2 x 4 76 vs 340 Arch Rival on 06 Aug 2016". WFTDA Stats Home. Retrieved 2019-09-11.
Watson, Michael. "OK City 48 vs 324 2 x 4 on 10 Aug 2016". WFTDA Stats Home. Retrieved 2019-09-11.
Watson, Michael. "Windy City 150 vs 145 2 x 4 on 06 May 2017". WFTDA Stats Home. Retrieved 2019-09-11.
Watson, Michael. "Helsinki 203 vs 113 2 x 4 on 07 May 2017". WFTDA Stats Home. Retrieved 2019-09-11.
Watson, Michael. "Rainy City 132 vs 126 2 x 4 on 25 Jan 2018". WFTDA Stats Home. Retrieved 2019-09-11.
Watson, Michael. "2 x 4 316 vs 53 Auld Reekie on 27 Jan 2018". WFTDA Stats Home. Retrieved 2019-09-11.
Watson, Michael. "Dublin 64 vs 242 2 x 4 on 27 Jan 2018". WFTDA Stats Home. Retrieved 2019-09-11.
Watson, Michael. "Middlesbrough 51 vs 375 2 x 4 on 30 Jan 2018". WFTDA Stats Home. Retrieved 2019-09-11.
Watson, Michael. "Paris 78 vs 182 2 x 4 on 06 Feb 2018". WFTDA Stats Home. Retrieved 2019-09-11.
Watson, Michael. "Bear City 193 vs 201 2 x 4 on 07 Feb 2018". WFTDA Stats Home. Retrieved 2019-09-11.
Watson, Michael. "Current International WFTDA Rankings". WFTDA Stats Home. Retrieved 2019-09-12.
Watson, Michael. "Angel City 218 vs 125 2 x 4 on 01 Sep 2018". WFTDA Stats Home. Retrieved 2019-09-11.
Watson, Michael. "Rat City 90 vs 106 2 x 4 on 01 Jun 2019". WFTDA Stats Home. Retrieved 2019-09-11.
Watson, Michael. "Arizona 101 vs 122 2 x 4 on 02 Jun 2019". WFTDA Stats Home. Retrieved 2019-09-11.
Watson, Michael. "Dallas 26 vs 295 2 x 4 on 02 Jun 2019". WFTDA Stats Home. Retrieved 2019-09-11.
Watson, Michael. "Bay Area 134 vs 176 2 x 4 on 05 Jun 2019". WFTDA Stats Home. Retrieved 2019-09-11.
Watson, Michael. "Paris 78 vs 182 2 x 4 on 06 Feb 2018". WFTDA Stats Home. Retrieved 2019-09-11.
Watson, Michael. "Texas 143 vs 58 2 x 4 on 07 Sep 2019". WFTDA Stats Home. Retrieved 2019-09-11.
Watson, Michael. "Rainy City 109 vs 172 2 x 4 on 08 Sep 2019". WFTDA Stats Home. Retrieved 2019-09-11.

wftda.com

"2 x 4 Roller Derby – WFTDA". wftda.com. WFTDA. Retrieved 15 April 2017.
Straw, Deanna GW (9 September 2019). "Sunday Recap: More Upsets in the Final Games of the 2019 International WFTDA Playoffs: Winston Salem". WFTDA. Retrieved 10 September 2019.
"WFTDA Welcomes 16 Apprentice Members Archived 2013-09-02 at the Wayback Machine", WFTDA, 26 April 2013
"WFTDA Welcomes 26 New Member Leagues - Latest News - Women's Flat Track Derby Association". www.wftda.com. Archived from the original on 2016-01-26. Retrieved 2016-05-04.
"Rankings: September 30, 2016 – WFTDA". wftda.com. 30 September 2016. Retrieved 2017-01-25.
"Seattle – WFTDA". wftda.com. Archived from the original on 2017-10-19. Retrieved 2017-10-18.
"Rankings: June 30, 2016 – WFTDA". wftda.com. July 2016. Retrieved 2017-01-25.
"Strength Factor Challenge (SFC) Program – WFTDA". wftda.com. Archived from the original on 2017-02-02. Retrieved 2017-01-25.
"A Coruña". WFTDA. Retrieved 2019-09-11.
"2018 Playoffs A Coruña Game 4: 2×4 vs. Sailor City – WFTDA". wftda.com. WFTDA. 31 August 2018. Retrieved 11 January 2019.
"2018 Playoffs A Coruña Game 14: Helsinki vs. 2×4 Roller Derby – WFTDA". wftda.com. WFTDA. 2 September 2018. Retrieved 11 January 2019.
"2019 International WFTDA Playoffs: Winston-Salem". WFTDA. Retrieved 2019-09-11.
"Current Rankings", WFTDA
"Rankings: December 31, 2016 – WFTDA". wftda.com. WFTDA. 6 January 2017. Retrieved 18 October 2017.
"Rankings: December 31, 2017 – WFTDA". wftda.com. WFTDA. 5 January 2018. Retrieved 5 January 2018.
"Rankings: December 31, 2018 – WFTDA". wftda.com. WFTDA. 7 January 2019. Retrieved 11 January 2019.

worldcat.org

search.worldcat.org

Di Pasqua, Damián (2011). "La imagen del Tango. Identidad, marca y valor del 2x4". Reflexión Académica en Diseño y Comunicación. XV. Buenos Aires, Argentina: Universidad de Palermo: 216. ISSN 1668-1673.

youtube.com

Emerald City Roller Derby (2017-05-07), Big O 2017: Big O Women's MVPs vs. USA Roller Derby [Women's Exhibition] (T1G19), retrieved 2017-10-17