Ledley, R. S. et al "The Case of the Touching and Overlapping Chromosomes" pp 87-98

Rosenfeld et al (eds) (1969) Rosenfeld et al (eds) "Pictorial pattern recognition" Thompson Washington DC 1969  

Languages mentioned BUGSYS {1964} Pattern based animation language SYNTAXSYS {1965} SEmantic acces to picture subsegments