@article{10_4153_CJM_1986_008_8,
     author = {Roberts, Paul},
     title = {Graded {Complexes} {Over} {Power} {Series} {Rings}},
     journal = {Canadian journal of mathematics},
     pages = {158--178},
     year = {1986},
     volume = {38},
     number = {1},
     doi = {10.4153/CJM-1986-008-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1986-008-8/}
}