1.Probability inequalities in multivariate distributions
Y. L. Tong.
Published 1980 by Academic Press in New York .

2.Ordering of Actuarial Risks.
R. Kaas, A.E. van Heerwaarden & M.J. Goovaerts (1998).
Caire Education Series 1, Caire, Brussels.

3.Comparison Methods for Stochastic Models and Risks.
Muller, A., D. Stoyan. 2002.
J. Wiley and Sons, New York, NY.