Kim, Taekyun, Kim, Dae San, Jang, Lee-Chae, and Kwon, Hyuck-In. “Extended Degenerate Stirling Numbers of the Second Kind and Extended Degenerate Bell Polynomials”. Utilitas Mathematica, vol. 106, Mar. 2018, https://utilitasmathematica.com/index.php/Index/article/view/1356.