@article{CM_1980__40_3_417_0,
     author = {Lang, William E.},
     title = {Two theorems on de {Rham} cohomology},
     journal = {Compositio Mathematica},
     pages = {417--423},
     publisher = {Sijthoff et Noordhoff International Publishers},
     volume = {40},
     number = {3},
     year = {1980},
     mrnumber = {571059},
     zbl = {0508.14011},
     language = {en},
     url = {http://www.numdam.org/item/CM_1980__40_3_417_0/}
}