Bollobas, Bela. Extremal graph theory / Bela Bollobas. - London ; New York : Academic Press, 1978. - xx, 488 p. : graphs ; 24 cm. - L.M.S. monographs ; 11 . - 511/.5 . Includes indexes. Bibliogr.: p. 438-479. ISBN: 0121117502 Subjects--Topical Terms: Graph theoryExtremal problems (Mathematics) Dewey Class. No.: 511/.5