@article{10_1007_s10492_005_0006_2,
     author = {Adamec, Ladislav},
     title = {A note on a generalization of {Diliberto's} {Theorem} for certain differential equations of higher dimension},
     journal = {Applications of Mathematics},
     pages = {93--101},
     publisher = {mathdoc},
     volume = {50},
     number = {2},
     year = {2005},
     doi = {10.1007/s10492-005-0006-2},
     mrnumber = {2125152},
     zbl = {1099.37032},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10492-005-0006-2/}
}