@article{10_4064_ap_28_1_11_16,
     author = {J. Chabrowski},
     title = {On the representation of non-negative solutions of linear parabolic systems of partial differential equations},
     journal = {Annales Polonici Mathematici},
     pages = {11--16},
     publisher = {mathdoc},
     volume = {28},
     number = {1},
     year = {1973},
     doi = {10.4064/ap-28-1-11-16},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-28-1-11-16/}
}