@article{10_1007_s10587_013_0035_z,
     author = {Zieli\'nski, Janusz and Ossowski, Piotr},
     title = {Rings of constants of generic {4D} {Lotka-Volterra} systems},
     journal = {Czechoslovak Mathematical Journal},
     pages = {529--538},
     publisher = {mathdoc},
     volume = {63},
     number = {2},
     year = {2013},
     doi = {10.1007/s10587-013-0035-z},
     mrnumber = {3073976},
     zbl = {06236429},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10587-013-0035-z/}
}