REFERENCES
- Russell V. Benson, Euclidean Geometry and Convexity, McGraw-Hill Book Co., New York, 1966, p. 230.
- Richard Courant and Herbert Robbins, What is Mathematics?, Oxford University Press, Inc., Fair Lawn, NJ, pp. 354–361, pp. 377–379.
- Sister Rita M. Ehrmann, Minimal surfaces rediscovered. Math Teacher, Vol. 69, no. 2 (1976), 146–152.
- Dorothy Wolfe, Imbedding a finite metric set in an n-dimensional Minkowski space, Nederl. Acad. Wetensch. Proc. Ser. A, Vol. 70(1967), 136–140.