TY - JOUR AU - Serap Bulut AU - Abbas Kareem Wanas TI - Coefficient estimates for families of bi-univalent functions defined by Ruscheweyh derivative operator JO - Mathematica Moravica PY - 2021 SP - 71 EP - 80 VL - 25 IS - 1 PB - mathdoc UR - https://geodesic-test.mathdoc.fr/item/MM3_2021_25_1_a5/ ID - MM3_2021_25_1_a5 ER -