@article{ASNSP_1968_3_22_4_607_0,
     author = {Aronson, D. G.},
     title = {Non-negative solutions of linear parabolic equations},
     journal = {Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche},
     pages = {607--694},
     publisher = {Scuola normale superiore},
     volume = {Ser. 3, 22},
     number = {4},
     year = {1968},
     mrnumber = {435594},
     zbl = {0182.13802},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1968_3_22_4_607_0/}
}