@article{RSMUP_1996__95__37_0,
     author = {Adolphson, Alan and Sperber, Steven},
     title = {Differential modules defined by systems of equations},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {37--57},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {95},
     year = {1996},
     mrnumber = {1405354},
     zbl = {0944.12003},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1996__95__37_0/}
}