@article{BUMI_2003_8_6B_2_a7,
     author = {Brinkschulte, Judith and Hill, C. Denson and Nacinovich, Mauro},
     title = {The {Poincar\'e} lemma and local embeddability},
     journal = {Bollettino della Unione matematica italiana},
     pages = {393--398},
     publisher = {mathdoc},
     volume = {Ser. 8, 6B},
     number = {2},
     year = {2003},
     zbl = {1150.32010},
     mrnumber = {888499},
     language = {it},
     url = {https://geodesic-test.mathdoc.fr/item/BUMI_2003_8_6B_2_a7/}
}