On the centre of graded Lie algebras
Homotopie algébrique et algèbre locale, Astérisque, no. 113-114 (1984), pp. 263-267 
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     author = {L\"ofwall, Clas},
     title = {On the centre of graded {Lie} algebras},
     booktitle = {Homotopie alg\'ebrique et alg\`ebre locale},
     series = {Ast\'erisque},
     pages = {263--267},
     year = {1984},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {113-114},
     zbl = {0569.17008},
     language = {en},
     url = {https://www.numdam.org/item/AST_1984__113-114__263_0/}
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Löfwall, Clas. On the centre of graded Lie algebras, dans Homotopie algébrique et algèbre locale, Astérisque, no. 113-114 (1984), pp. 263-267. https://www.numdam.org/item/AST_1984__113-114__263_0/

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