TIMOTHY OLOYEDE OPOOLA, EZEKIEL ABIODUN OYEKAN, SEYI DEBORAH OLUWASEGUN and PETER OLUWAFEMI ADEPOJU 2023. New subfamilies of univalent functions defined by Opoola differential operator and connected with modified Sigmoid function. Malaya Journal of Matematik. 11, S (Oct. 2023), 53–69. DOI:https://doi.org/10.26637/mjm11S/004.