@article{BSMF_1978__106__289_0,
     author = {Van Daele, Alfons},
     title = {A framework to study commutation problems},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {289--309},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {106},
     year = {1978},
     doi = {10.24033/bsmf.1874},
     mrnumber = {80k:46066},
     zbl = {0389.46047},
     language = {en},
     url = {http://www.numdam.org/articles/10.24033/bsmf.1874/}
}