Kovalevskii, A. A. 1996. “On the $Γ$-Convergence of Integral Functionals Defined on Sobolev Weakly Connected Spaces”. Ukrains’kyi Matematychnyi Zhurnal 48 (5): 614-28. https://umj.imath.kiev.ua/index.php/umj/article/view/5294.