@article{SMS_1969-1970__1__A3_0,
     author = {Lenormand, Claude},
     title = {Op\'erateurs sur les polyn\^omes non commutatifs d\'efinitions et notations},
     journal = {S\'eminaire Sch\"utzenberger},
     note = {talk:3},
     pages = {1--9},
     publisher = {Secr\'etariat math\'ematique},
     volume = {1},
     year = {1969-1970},
     zbl = {0221.16026},
     language = {fr},
     url = {http://www.numdam.org/item/SMS_1969-1970__1__A3_0/}
}