El Attar, Abderrahim, Mostafa El Hachloufi, and Guennoun Zine El Abidine. 2018. “Optimization of Surplus Reinsurance Treaty Using the Conditional Tail Expectation”. Pakistan Journal of Statistics and Operation Research 14 (1), 95-107. https://doi.org/10.18187/pjsor.v14i1.1973.