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Chao-Ping Chen, Long Lin, “Remarks on asymptotic expansions for the gamma function”, Applied Mathematics Letters, 25, № 12, 2012, 2322
Chao-Ping Chen, “Unified treatment of several asymptotic formulas for the gamma function”, Numer Algor, 64, № 2, 2013, 311
Barkat Ali Bhayo, Matti Vuorinen, “On generalized trigonometric functions with two parameters”, Journal of Approximation Theory, 164, № 10, 2012, 1415
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Chao-Ping Chen, “Padé Approximant Related to Ramanujan’s Formula for the Gamma Function”, Results Math, 73, № 3, 2018, 107
Mansour Mahmoud, Saud M. Alsulami, Safiah Almarashi, “On Some Bounds for the Gamma Function”, Symmetry, 15, № 4, 2023, 937