Refining the Galerkin method error estimation for parabolic type problem with a boundary conditionAlisher Mamatov, Xusanboy Narjigitov, Dilshod Turdibayev and Jamshidbek RakhmanovE3S Web Conf., 304 (2021) 03019DOI: https://doi.org/10.1051/e3sconf/202130403019