Siam journal of applied mathematics - Pennsylvania Society of Industrial and Applied mathematics 1953 - vol1.,no.1 . Lib.has v.14 (1966) -v.15(1967), v.34(1978) -v.40(1981), v.42(1982)v-v45 (1982) -v46 (1986) Universal Decimal Class. No.: 51(05) / SIA