@article{MS2_1971__28_166184,
     author = {M.P. Sch\"utzenberger and D. Foata},
     title = {On the {Principle} of {Equivalence} of {Sparre} {Andersen.}},
     journal = {Mathematica Scandinavica},
     pages = {308--316},
     publisher = {mathdoc},
     volume = {28},
     year = {1971},
     zbl = {0323.60004},
     url = {http://geodesic.mathdoc.fr/item/MS2_1971__28_166184/}
}