Panigrahi, T., & Mohapatra, S. K. (2021). Coefficient Estimates for Bi-univalent Functions Defined by (P, Q) Analogue of the Salagean Differential Operator Related to the Chebyshev Polynomials. Journal of Mathematical and Fundamental Sciences, 53(1), 49-66. https://doi.org/10.5614/j.math.fund.sci.2021.53.1.4