2008 Masters Thesis in Anthropology:  "Are bicultural bonobos able to recognize iconic representations and produce referential signs in human cultural terms?", Iowa State University, Department of Anthropology

2010 Iugural issue of Rambam Maimonides Medical Journal, - Rambam Medical Center, Israel - http://www.rmmj.org.il/

Roffman I, Nevo E. Can Chimpanzee Biology Highlight Human Origin and Evolution? RMMJ 2010;1(1):e0009. doi:10.5041/RMMJ.10009

Main article: 

http://www.rmmj.org.il/userimages/10/0/PublishFiles/10Article.pdf 

Supplementary material: 

http://www.rmmj.org.il/userimages/10/0/PublishFiles/10ArticleAM.pdf