Graph Theory: Favorite Conjectures and Open Problems - 2 (Problem Books in Mathematics)
Combinatorics: A Problem-Based Approach (Problem Books in Mathematics)
Handbook of Product Graphs (Discrete Mathematics and Its Applications)
Proofs from THE BOOK
A Seminar on Graph Theory (Dover Books on Mathematics)
Extremal Graph Theory (Dover Books on Mathematics)
Functions and Graphs (Dover Books on Mathematics)
Introductory Graph Theory (Dover Books on Mathematics)