The following publications are possibly variants of this publication:
- Experiences of a Newbie Helper in a Free Open Online Mathematics Help Forum CommunityCarla van de Sande. cscl 2013: 510-517
- Free, open, online, mathematics help forums: the good, the bad, and the uglyCarla van de Sande. icls 2010: 643-650 [doi]
- Grassroots open, online, calculus help forumsCarla van de Sande. cscl 2009: 43-47 [doi]
- How are students' problems being solved? The quality of worked solutions on a popular open, online, mathematics, help forumCarla van de Sande. cscl 2011: [doi]