El-Shehawy , S. ., and S. El-Seraf. “Using a Parametric Function to Study the Deformation of the Hyperbolic Secant Distribution”. Journal of Qassim University for Science, vol. 8, no. 2, July 2015, pp. 183-01, https://jnsm.qu.edu.sa/index.php/jnm/article/view/1779.