Jacob Getzels and Mihaly Csikszentmihalyi, The Creative Vision: A Longitudinal Study of Problem Finding in Art (New York: Wiley, 1976); Mihaly Csikszentmihalyi and Jacob Getzels, “Creativity and Problem Finding,” in Frank H. Farley and Ronald W. Neperud, eds., The Foundations of Aesthetics, Art, and Art Education (New York: Praeger, 1988). Цит. по: Mihaly Csikszentmihalyi, Flow: The Psychology of Optimal Experience (New York: Harper Perennial, 1981), 277.