@article{M2AN_1981__15_1_41_0,
     author = {Johnson, Claes and Thomee, Vidar},
     title = {Error estimates for some mixed finite element methods for parabolic type problems},
     journal = {RAIRO. Analyse num\'erique},
     pages = {41--78},
     publisher = {Centrale des revues, Dunod-Gauthier-Villars},
     address = {Montreuil},
     volume = {15},
     number = {1},
     year = {1981},
     mrnumber = {610597},
     zbl = {0476.65074},
     language = {en},
     url = {http://www.numdam.org/item/M2AN_1981__15_1_41_0/}
}