Marcus, Moshe, and Andrey E. Shishkov. “Propagation of Strong Singularities in Semilinear Parabolic Equations With Degenerate Absorption”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE 16, no. 3 (September 29, 2016): 1019-1047. Accessed May 26, 2025. http://20.103.181.36/index.php/annaliscienze/article/view/473.