F.~Pennini., and A.~Plastino. “Different Creation-Destruction operators’ Ordering, Quasi-Probabilities, and Mandel Parameter”. Revista Mexicana De Física E, vol. 60, no. 2 Jul-Dec, Jan. 2014, pp. 103-0, https://rmf.smf.mx/ojs/index.php/rmf-e/article/view/4718.