1. AICI = Automatic Interpretation and Classification of Images (ed. by A. GRASSELLI), Academic Press, New York/London.
2. PPR = Pictorial Pattern Recognition (ed. by G.C. CHENG et al., Thompson Book Co., Washington, D.C.
3. Classification into two multivariate normal distributions with different co-variance matrices;Anderson;Ann. Math. Statist.,1962
4. Teaching computers to recognize patterns;Arkadev,1967
5. The remote reconnaissance of extraterrestrial environments;Asendorf;PPR,1968