@article{10_4153_CJM_1978_006_1,
     author = {Behrens, Ernst August},
     title = {Formal {Power} {Series} {Over} {Commutative} {N-Algebras}},
     journal = {Canadian journal of mathematics},
     pages = {66--84},
     year = {1978},
     volume = {30},
     number = {1},
     doi = {10.4153/CJM-1978-006-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1978-006-1/}
}