Vijaya, Kaliyappan, and Murugesan Kasthuri. “Multivalently Meromorphic Functions With Two Fixed Points Defined by Srivastava-Attiya Operator”. Global Journal of Mathematical Analysis, vol. 2, no. 3, Aug. 2014, pp. 213-26, https://doi.org/10.14419/gjma.v2i3.3176.