1990'1, p.100
Guberman Sh. A.
Artificial intellect-88 and M. Vertheimer's "Productive thinking" (1945)

To ascertain the nature of emotional stability in is necessary to comprehend the subject and dynamics of motives, experiences, cognitive processes in extremal situation. It cannot come to emotional self-regulation, manifestations of will-power or temperament. The study and control of emotional stability have to do with biological, psychological and social spheres of personality. The demonstration of emotional stability as a personal quality and as a psychic state enables one to find the ways of its increase, preservation and implementation in difficult situations.