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@article{PORMA_1981__40_4_115463, author = {Hassan, M.I.}, title = {On the first mixed problem for a parabolic equation with right side in $L_{loc}^2$}, journal = {Portugaliae mathematica}, pages = {369--375}, publisher = {mathdoc}, volume = {40}, number = {4}, year = {1981}, mrnumber = {0836097}, url = {http://geodesic.mathdoc.fr/item/PORMA_1981__40_4_115463/} }
Hassan, M.I. On the first mixed problem for a parabolic equation with right side in $L_{loc}^2$. Portugaliae mathematica, Tome 40 (1981) no. 4, pp. 369-375. http://geodesic.mathdoc.fr/item/PORMA_1981__40_4_115463/