• [1] Samuel Eilenberg and Deane Montgomery, Fixed point theorems for multi-valued transformations, Amer. J. Math. 68 (1946), 214–222. MR 0016676 (8,51a)
• [2] Shizuo Kakutani, A generalization of Brouwer’s fixed point theorem, Duke Math. J. 8 (1941), 457–459. MR 0004776 (3,60c)
• [3] A. D. Wallace, Classroom notes for algebraic topology, Tulane Univ., New Orleans, La.
• [4] G. Hocking and G. S. Young, Topology, Addison-Wesley, Reading, Mass., 1956.

Bibliography

[1]

Samuel Eilenberg and Deane Montgomery, Fixed point theorems for multi-valued transformations, Amer. J. Math. 68 (1946), 214-222. MR 0016676 (8:51a)

[2]

Shizuo Kakutani, A generalization of Brouwer's fixed point theorem, Duke Math. J. 8 (1941), 457-459. MR 0004776 (3:60c)

[3]

A. D. Wallace, Classroom notes for algebraic topology, Tulane Univ., New Orleans, La.

[4]

G. Hocking and G. S. Young, Topology, Addison-Wesley, Reading, Mass., 1956.