West, D. B. (2001). Introduction to graph theory (2nd ed.). Prentice Hall.
Diestel, R. (2017). Graph theory (5th ed.). Springer.
Euler, L. (1736). Solutio problematis ad geometriam situs pertinentis. Commentarii Academiae Scientiarum Imperialis Petropolitanae
Gale, D., & Shapley, L. S. (1962). College admissions and the stability of marriage. American Mathematical Monthly, 69(1)
Papadimitriou, C. H. (1994). Computational complexity. Addison-Wesley.
Appel, K., & Haken, W. (1976). Every planar map is four colorable. Bulletin of the American Mathematical Society, 82(5)