@article{702149,
     title = {Supersymmetry algebras: extensions of orthgonal Lie algebras},
     booktitle = {Proceedings of the 14th Winter School on Abstract Analysis},
     series = {GDML\_Books},
     publisher = {Circolo Matematico di Palermo},
     address = {Palermo},
     year = {1987},
     pages = {[77]-92},
     mrnumber = {MR0920847},
     zbl = {0639.17012},
     url = {http://dml.mathdoc.fr/item/702149}
}

Hasiewicz, Zbigniew. Supersymmetry algebras: extensions of orthgonal Lie algebras, dans Proceedings of the 14th Winter School on Abstract Analysis, GDML_Books,  (1987), pp. [77]-92. http://gdmltest.u-ga.fr/item/702149/