Kumar, Vishvesh, Michael Ruzhansky, and Rong Zhang. “Liouville Type Theorems for Subelliptic Systems on the Heisenberg Group With General Nonlinearity”. Annales Fennici Mathematici 49, no. 2 (October 15, 2024): 561–582. Accessed November 21, 2024. https://afm.journal.fi/article/view/148660.