LITTLE KEVIN: a program for the estimation of protein homology by analysing the amino acid compositions and sequences. - Joël-Paul Grillasca; Denis Aubert; Richard Planells; N. Domingo; H. Lafont (Comput. Appl. Biosci., 1996)

SPAC: Identification of Polypeptides using Their Amino-acid Composition. - Joël-Paul Grillasca; Richard Planells; Denis Aubert; François Antonini (Comput. Chem., 2000)