@article{MM2_1973__8_154132,
     author = {Andrei Duma},
     title = {\"Uber die {Starrheit} der {n-Jacobi-Struktur.}},
     journal = {Manuscripta mathematica},
     pages = {27--32},
     publisher = {mathdoc},
     volume = {8},
     year = {1973},
     zbl = {0247.32014},
     url = {http://geodesic.mathdoc.fr/item/MM2_1973__8_154132/}
}