Tuomas Holopainen (English Wikipedia)

"Musical Discoveries". Visions of Atlantis (Nicole Bogner). Retrieved 30 December 2005.
"Musical Discoveries". After Forever. Retrieved 30 December 2005.

nightwish.com

"The Band " Members " Tuomas". Nightwish. Archived from the original on 13 April 2014. Retrieved 12 April 2014.
"The Band " Nightmail " Tuomas". Nightwish. June 2006. Archived from the original on 13 April 2014. Retrieved 12 April 2014.
"Nightwish Label Information". Spinefarm Records. Retrieved 15 November 2009.
"Nightwish.com band diary". Archived from the original on 6 October 2009. Retrieved 18 February 2015.
"Nightwish.com – Nightmail". Archived from the original on 6 October 2009. Retrieved 18 February 2015.

Everley, Dave (8 December 2015). "How Nightwish became a modern metal phenomenon". Metal Hammer. Team Rock. Retrieved 2 January 2016.

"The Gauntlet". Sonata Arctica Interview. Archived from the original on 20 June 2007. Retrieved 17 June 2007.

Holopainen, Tuomas. "The Escapist". Diary Entry on The Escapist. Archived from the original on 28 December 2012. Retrieved 5 December 2012.

"Tuomas Holopainen Biography". Valley of Wishes. Archived from the original on 7 November 2006. Retrieved 12 April 2014.

"The Band " Members " Tuomas". Nightwish. Archived from the original on 13 April 2014. Retrieved 12 April 2014.
"For My Pain". Metal from Finland. Archived from the original on 20 February 2009. Retrieved 20 February 2009.
"Kirsti Nortia-Holopainen: "I'm there for Tuomas when he has heartache"". Eaglescry.de. Archived from the original on 5 August 2010. Retrieved 7 August 2010.
"Tuomas Holopainen Biography". Valley of Wishes. Archived from the original on 7 November 2006. Retrieved 12 April 2014.
"The Band " Nightmail " Tuomas". Nightwish. June 2006. Archived from the original on 13 April 2014. Retrieved 12 April 2014.
"Nightwish: Floor Jansen, Tuomas Holopainen and Marco Hietala on making the cut as a musician". The Cut. 31 December 2015. Archived from the original on 8 January 2016. Retrieved 2 January 2016.
"Nightwish.com band diary". Archived from the original on 6 October 2009. Retrieved 18 February 2015.
"Nightwish.com – Nightmail". Archived from the original on 6 October 2009. Retrieved 18 February 2015.
"Kylähullut". Members. Archived from the original on 7 May 2008. Retrieved 5 September 2008.
Holopainen, Tuomas. "The Escapist". Diary Entry on The Escapist. Archived from the original on 28 December 2012. Retrieved 5 December 2012.
"Epica Online". Profile Simone. Archived from the original on 22 April 2006. Retrieved 28 December 2005.
"The Gauntlet". Sonata Arctica Interview. Archived from the original on 20 June 2007. Retrieved 17 June 2007.