Goel, D., Rădulescu, V.D. and Sreenadh, K. 2022. Variational framework and Lewy-Stampacchia type estimates for nonlocal operators on Heisenberg group. Annales Fennici Mathematici. 47, 2 (Apr. 2022), 707–721. DOI:https://doi.org/10.54330/afm.116794.