Wintjens, René T.; Rooman, Marianne J.; Wodak, Shoshana J. (January 1996). "Automatic Classification and Analysis of αα-Turn Motifs in Proteins". Journal of Molecular Biology. 255 (1): 235–253. doi:10.1006/jmbi.1996.0020. PMID8568871.
Wintjens, René T.; Rooman, Marianne J.; Wodak, Shoshana J. (January 1996). "Automatic Classification and Analysis of αα-Turn Motifs in Proteins". Journal of Molecular Biology. 255 (1): 235–253. doi:10.1006/jmbi.1996.0020. PMID8568871.