Mathematical Biosciences an international journal Volume 149 H. Antonius van den Berg, Multiple nutrient limitation in unicellulars: reconstruct- ng Liebig's law M.G. Roberts, R.R. Kao, The dynamics of an infectious disease in a population with birth pulses G.E. Hernndez. Age-density dependent population dispersal in R’ E Beretta, Y. Kuang, Modeling and analysis of a marine bacteriophage infection G.J. Vulcano, D.F. Moses, A. Vaicrcel, M.A. de las Heras, A lineal equation for the classification of progressive and hyperactive spermatozoa F.D. Alfano, A stochastic model of cellular transformation and its relevance to chemical carcinogenesis T. Radivoyevitch, D.G. Hoel, P. Hahnfeldt, R.K. Sachs, Size distributions of misrejoining DNA fragments in irradiated cells J.D. Evans, G.C. Kember, Analytical solutions to a tapering multicylinder somatic shunt cable model for passive neurones A. Mukhopadhyay, J. Chattopadhyay, P.K. Tapaswi, A delay differential equations model of plankton allelopathy M.A. Charleston, Jungles: a new solution to the host/parasite phylogeny reconciliation problem Volume Contents Elsevier