@article{ARM_1983__19_2_a3,
     author = {Chrastina, Jan},
     title = {A double complex related with a system of partial differential equations. {I}},
     journal = {Archivum mathematicum},
     pages = {83--97},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {1983},
     mrnumber = {724301},
     zbl = {0539.58001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1983__19_2_a3/}
}