BanduraA., SaloT., and SkaskivO. “Boundedness of the $L$-Index in the Direction of the Composition of Slice Entire Functions and Slice Holomorphic Functions in the Unit Ball”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 76, no. 6, July 2024, pp. 802–819, doi:10.3842/umzh.v76i5.8153.