Bibliographical references Abramowitz, M. and Stegrm, l.A. (1964). Handbook of Mathematical Functions. New York, N.Y.: Dover Publications. Press W. et al (1987). Numerical Recipes. New York. Cambridge University Press. Burden, R.L. and Faires, J.D.(1985). Numerical Analysis, P.W.S., Boston. Bowers, N.L., Gerber, H.U., Hickman, J.C. Jones, D.A. and Nesbitt, C.J. (1986) Actuarial Mathematics. Ithasca, ID.: Society of Actuaries. Dickson, D.C.M. (1989). Recursive Calculation of the Probability and Severity of Ruin. Insurance: Mathematics and Economics, 8, pp. 145-148. Dickson, D.C.M., Egidio dos Reis, and Waters, H.R. (1995) "Sorne Stable Algorithms in Ruin Theory and Their Application." Astin Bulletin 25, 153-175. Dickson, D.C.M. and Waters, H.R. (1991) "Recursive Calculation of Survival Probabilities." Astin Bulletin 21, 199-221. Gerber, H.U. (1979) An Introduction to Mathematical Risk Theory. Huebner Foundation Monograph 8. Philadelphia, Pa.: University of Pennsylvania. (Distributed by Irwin, Homewood, IL.) Goovaerts, M. and de Vylder, F. (1984). "A Stable Recursive Algorithm for Evaluation of Ultimate Ruin Probabilities." ASTIN Bulletin, 14, pp. 53-59. Grandell, J. (1990). Aspects of Risk Theory. Springer Verlag, New York. Panjer, H.H. (1986). "Direct Calculation of Ruin Probabilities." Journal of Risk and Insumnce, 53, pp. 521-529. Panjer, H.H. & Wilhnot, G.E. (1992). Insumnce risk Models, Society of Actuaries Schaumburg. Ramsay, C.M. (1992a). "A Practical Algorithm for Approximating the Probability of Ruin." Transactions of the Society of Actuaries, XLIV, 443-59. Ramsay, C.M. (1992b). "Improving Goovaerts' and De Vylder's Stable Recursive Algorithm. ASTIN Bulletin, 22, 51-59. Ramsay,C.M. and Usábel,M.A. (1997). Calculating Ruin probabilities via Product integmtion. Próxima aparición ASTIN BULLETIN Mayo 1997.cv. Thorin, O and Wikstad, N. (1977). "Calculation of Ruin Probabilities When the Claim Distribution Is LognormaL" ASTIN Bulletin, 9, 231-246.