@article{AA_1991_3_6_a5,
     author = {M. Marino and A. Maugeri},
     title = {Maximum principle for parabolic systems},
     journal = {Algebra i analiz},
     pages = {155--163},
     publisher = {mathdoc},
     volume = {3},
     number = {6},
     year = {1991},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AA_1991_3_6_a5/}
}