@article{10_4064_am_12_1_103_106,
     author = {A. Szustalewicz},
     title = {On a variant of the matrix transformation method for approximate solution of partial differential equations of second degree},
     journal = {Applicationes Mathematicae},
     pages = {103--106},
     publisher = {mathdoc},
     volume = {12},
     number = {1},
     year = {1971},
     doi = {10.4064/am-12-1-103-106},
     zbl = {0225.65089},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-12-1-103-106/}
}