Mulder, H. M. The interval function of a graph/ H.M. Mulder. - Amsterdam ; Mathematisch Centrum, 1980. - iii, 191 p.: ill.; 24 cm. - Mathematical Centre tracts; 132. . Includes indexes. Bibliography: p. 183-186. ISBN: 9061962080 (pbk.) LCCN: 81131592 Subjects--Topical Terms: Graph theory. Dewey Class. No.: 511.5 / M954i