April Bleske-Rechek, Erin Somers, Cierra Micke, Leah Erickson, Lindsay Matteson, Corey Stocco, Brittany Schumacher, Laura Ritchie, University of Wisconsin-Eau Claire, 2012, Journal of Social and Personal Relationships, Benefit or burden?: Attraction in cross-sex friendship, Retrieved Sept. 29, 2014, pages 569-596
Oxford Dictionary, friend zoneArxivat 2016-03-03 a Wayback Machine., Accessed Jan. 22, 2014, "...a situation in which a friendship exists between two people, one of whom has an unrequited romantic or sexual interest in the other.
Emily Yahr «The CW's 'Plain Jane,' a not-so-extreme makeover show». Washington Post, 25-07-2010 [Consulta: 24 febrer 2011]. «she harbors a hard-core crush on her buddy Ty, who has categorized her in "the friend zone" since college.»
web.archive.org
Oxford Dictionary, friend zoneArxivat 2016-03-03 a Wayback Machine., Accessed Jan. 22, 2014, "...a situation in which a friendship exists between two people, one of whom has an unrequited romantic or sexual interest in the other.