no. 4
The Hochschild cohomology ring of regular maximal primitive quotients of enveloping algebras of semisimple Lie algebras
Annales scientifiques de l'École Normale Supérieure, Série 4, Tome 29 (1996) no. 4, pp. 535-538. 
@article{ASENS_1996_4_29_4_535_0,
     author = {Soergel, Wolfgang},
     title = {The Hochschild cohomology ring of regular maximal primitive quotients of enveloping algebras of semisimple Lie algebras},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {535--538},
     publisher = {Elsevier},
     volume = {Ser. 4, 29},
     number = {4},
     year = {1996},
     doi = {10.24033/asens.1747},
     zbl = {0871.17005},
     mrnumber = {97e:17016},
     language = {en},
     url = {archive.numdam.org/item/ASENS_1996_4_29_4_535_0/}
}
Soergel, Wolfgang. The Hochschild cohomology ring of regular maximal primitive quotients of enveloping algebras of semisimple Lie algebras. Annales scientifiques de l'École Normale Supérieure, Série 4, Tome 29 (1996) no. 4, pp. 535-538. doi : 10.24033/asens.1747. http://archive.numdam.org/item/ASENS_1996_4_29_4_535_0/

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