G. E. Lasker.International Congress on Applied Systems Research and Cybernetics (1990 : Mexico)：Applied systems and cybernetics ．V.1，the quality of life : systems approaches. proceedings.Pergamon,1981.
International Congress on Applied Systems Research and Cybernetics (1990 : Mexico)：Applied systems and cybernetics ．V.1，the quality of life : systems approaches. proceedings
G. E. Lasker.International Congress on Applied Systems Research and Cybernetics (1980 : Mexico)：Applied systems and cybernetics．V.3，human systems, sociocybernetics, management and organizations.Pergamon,1981.
International Congress on Applied Systems Research and Cybernetics (1980 : Mexico)：Applied systems and cybernetics．V.3，human systems, sociocybernetics, management and organizations
G. E. Lasker.International Congress on Applied Systems Research and Cybernetics (1990 : Mexico)：Applied systems and cybernetics ．V.4，systems research in health care, biocybernetics and ecology.Pergamon,1981.
International Congress on Applied Systems Research and Cybernetics (1990 : Mexico)：Applied systems and cybernetics ．V.4，systems research in health care, biocybernetics and ecology
G. E. Lasker.International Congress on Applied Systems Research and Cybernetics (1980 : Mexico)：Applied systems and cybernetics ．V.6，fuzzy sets and fuzzy systems, possibility theory and special topics in systems research.Pergamon,1981.
International Congress on Applied Systems Research and Cybernetics (1980 : Mexico)：Applied systems and cybernetics ．V.6，fuzzy sets and fuzzy systems, possibility theory and special topics in systems research
