Murzin AG (October 1992). „Structural principles for the propeller assembly of beta-sheets: the preference for seven-fold symmetry”. Proteins14 (2): 191–201. DOI:10.1002/prot.340140206. PMID1409568.
Murzin AG (October 1992). „Structural principles for the propeller assembly of beta-sheets: the preference for seven-fold symmetry”. Proteins14 (2): 191–201. DOI:10.1002/prot.340140206. PMID1409568.