TY - BOOK AU - Christian Ksumo TI - Minimizing the probability of ultimate ruin by propotional reinsurance and investiments AV - THS EAF HG8078.K37 PY - 2011/// CY - Dar es Salaam , PB - Dar es Salaam KW - Insurance companies, KW - Investments N1 - Includes bibliographical references Thesis: M.Sc(Mathematical modelling)-University of Dar es Salaam ER -