Characteristics of declarative programming languages. 1999. RobertHarper(英语:RobertHarper (computerscientist)). What, If Anything, Is A Declarative Language? (页面存档备份,存于互联网档案馆)
Jersey的活跃开发。 在1990年,Robin Milner、Mads Tofte(英语:Mads Tofte)和RobertHarper(英语:RobertHarper (computerscientist))制定的Standard ML的正式规定《The Definition of Standard
2005 [10 June 2013]. (原始内容存档于2013-11-01). Adler, Robert. Entering a dark age of innovation. New Scientist. 2 July 2005 [30 May 2013]. (原始内容存档于2015-04-27)