Orhan, H. 2026. Coefficient estimates in new subclasses of analytic and bi-univalent functions defined by the combinations of the $q$-derivative and the Sǎlǎgean derivative operator. Ukrains’kyi Matematychnyi Zhurnal. 78, 1-2 (Jan. 2026), 88. DOI:https://doi.org/10.3842/umzh.v78i1-2.9261.