1. Balakrishnan N., Lai C.-D., Continuous Bivariate Distributions, 2nd ed., Springer, New York, 2009
2. Broll U., Egozcue M., Wong W.-K., Zitikis R., Prospect theory, indifference curves, and hedging risks, Appl. Math. Res. Express. AMRX, 2010, 2, 142–153
3. Cerone P., Dragomir S.S., Mathematical Inequalities, CRC Press, Boca Raton, 2011
4. Cuadras C.M., On the covariance between functions, J. Multivariate Anal., 2002, 81(1), 19–27
5. Denuit M., Dhaene J., Goovaerts M., Kaas R., Actuarial Theory for Dependent Risks: Measures, Orders and Models, John Wiley & Sons, Chichester, 2005