"Penn Station Access Study". web.mta.info. Metropolitan Transportation Authority. Archived from the original on September 19, 2017. Retrieved September 26, 2017.
"Penn Station Access Background". web.mta.info. Metropolitan Transportation Authority. July 2018. Archived from the original on July 3, 2018. Retrieved July 4, 2018.
"PSA: Shops & Yards". mta.info. Metropolitan Transportation Authority. Archived from the original on July 4, 2018. Retrieved February 1, 2017.
"Connecticut Presentation (2013)"(PDF). mta.info. Metropolitan Transportation Authority. March 2013. Archived(PDF) from the original on March 29, 2017. Retrieved January 27, 2017.
"Penn Station Access Study". web.mta.info. Metropolitan Transportation Authority. Archived from the original on September 19, 2017. Retrieved September 26, 2017.
"Penn Station Access Background". web.mta.info. Metropolitan Transportation Authority. July 2018. Archived from the original on July 3, 2018. Retrieved July 4, 2018.
"PSA: Shops & Yards". mta.info. Metropolitan Transportation Authority. Archived from the original on July 4, 2018. Retrieved February 1, 2017.
"Connecticut Presentation (2013)"(PDF). mta.info. Metropolitan Transportation Authority. March 2013. Archived(PDF) from the original on March 29, 2017. Retrieved January 27, 2017.