Fodje MN, Al-Karadaghi S (2002). „Occurrence, conformational features and amino acid propensities for the pi-helix”. Protein Eng. 15 (5): 353—358. PMID12034854. doi:10.1093/protein/15.5.353.
Fodje MN, Al-Karadaghi S (2002). „Occurrence, conformational features and amino acid propensities for the pi-helix”. Protein Eng. 15 (5): 353—358. PMID12034854. doi:10.1093/protein/15.5.353.