@article{MM2_1976__19_154418,
     author = {R. Michel and C. Hipp},
     title = {A {Characterisation} of {Chebyshev-Cramer} {Expansions.}},
     journal = {Manuscripta mathematica},
     pages = {275--282},
     publisher = {mathdoc},
     volume = {19},
     year = {1976},
     zbl = {0336.60054},
     url = {http://geodesic.mathdoc.fr/item/MM2_1976__19_154418/}
}