A. P. Toropova, A. A. Toropov, B. F. Rasulev, E. Benfenati, G. Gini, D. Leszczynska & J. Leszczynski. Struct Chem. QSAR models for ACE-inhibitor activity of tri-peptides based on representation of the molecular structure by graph of atomic orbitals and SMILES. 2012; 23:1873–1878.