Mathematical Biosciences an international journal Volume 162 Numbers 1&2 November/December, 1999 Q. Zheng, Progress of a half century in the study of the Luria—Delbrick distribution J. Lin, V. Andreasen and S.A. Levin, Dynamics of influenza A drift: the linear three-strain model H. Echavarria-Heras, Optimal control of receptor reinsertion in the Low Density Lipoprotein endocytic cycle D.V. Vayenas and S. Paviou, Chaotic dynamics of a food web in a chemostat T. Radivoyevitch and D.G. Hoel, Modeling the low-LET dose-response of BCR-— ABL formation: predicting stem cell numbers from A-bomb data 1999 Author index 1999 Subject index Volume contents Information for Authors Elsevier