@article{ASNSP_1971_3_25_2_221_0,
     author = {Aronson, D. G.},
     title = {Non-negative solutions of linear parabolic equations : an addendum},
     journal = {Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche},
     pages = {221--228},
     publisher = {Scuola normale superiore},
     volume = {Ser. 3, 25},
     number = {2},
     year = {1971},
     mrnumber = {435595},
     zbl = {0223.35046},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1971_3_25_2_221_0/}
}