المؤلفون: Cohen, Y. E., Russ, B. E., Davis, S. J., Baker, A. E., Ackelson, A. L., Nitecki, R.

المصدر: Proceedings of the National Academy of Sciences of the United States of America, 2009 Nov . 106(47), 20045-20050.

الوصول الحر: https://www.jstor.org/stable/25593321Test

المؤلفون: Acun, Ramazan, Anane, Rachid, Laflin, Susan

المصدر: Computers and the Humanities, 1997 Jan 01. 31(6), 483-502.

الوصول الحر: https://www.jstor.org/stable/30204781Test