@article{MM2_1975__17_154357,
     author = {Roland Zielke},
     title = {Tchebyshev {Systems} {That} {Cannot} be {Transformed} {Into} {Markov} {Systems.}},
     journal = {Manuscripta mathematica},
     pages = {67--72},
     publisher = {mathdoc},
     volume = {17},
     year = {1975},
     zbl = {0314.41023},
     url = {http://geodesic.mathdoc.fr/item/MM2_1975__17_154357/}
}