DrewsE.M. (1972). Learning together. New York: Prentice-Hall.
2.
GrostA. (1970). Genius in residence. Englewood Cliffs, NJ: Prentice-Hall.
3.
HollingsworthL.S. (1975). Children above 180 I.Q. (Reprint of 1943 ed.). New York: Arno Press.
4.
StanleyJ.C.KeatingD.P.FoxL.H. (1974). Mathematical talent: discovery, description, and development. Baltimore, MD: Johns Hopkins University Press.
5.
TermanL.M.OdenM. (1947). Genetic studies of genius: mental and physical traits of a thousand gifted children. Vol. 1. Stanford, CA: Stanford University Press.