Kovalevskii, A. A. “γ-Convergence of Integral Functionals and the Variational Dirichlet Problem in Variable Domains”.
Ukrains’kyi Matematychnyi Zhurnal, vol. 48, no. 9, Sept. 1996, pp. 1236–1254,
https://umj.imath.kiev.ua/index.php/umj/article/view/5238.