@article{PDML_1982___4B_A12_0,
     author = {Guichardet, A.},
     title = {Extensions de plusieurs repr\'esentations des groupes produits semi-directs},
     journal = {Publications du D\'epartement de math\'ematiques (Lyon)},
     pages = {1--6},
     publisher = {Universit\'e Claude Bernard - Lyon 1},
     number = {4B},
     year = {1982},
     zbl = {0528.22002},
     language = {fr},
     url = {http://archive.numdam.org/item/PDML_1982___4B_A12_0/}
}