@article{ASNSP_1972_3_26_1_247_0,
     author = {Barros-Neto, J.},
     title = {The parametrix of regular hypoelliptic boundary value problems},
     journal = {Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche},
     pages = {247--268},
     publisher = {Scuola normale superiore},
     volume = {Ser. 3, 26},
     number = {1},
     year = {1972},
     mrnumber = {477425},
     zbl = {0235.35026},
     language = {en},
     url = {http://archive.numdam.org/item/ASNSP_1972_3_26_1_247_0/}
}