Cezar Martins de Sa, Maria-Fatima Grossi de Sa, Omar Akhayat Florence Broders, Klaus Scherrer, Andrea Horsch, Hans-Peter Schmid,
Prosomes. Ubiquity and inter-species structural variation. Journal of Molecular Biology. ,vol. 187, pp. 479- 493 ,(1986) ,
10.1016/0022-2836(86)90328-1