@article{ARM_1971__7_1_a4,
     author = {Popovici, Iulian and Iordanescu, Radu and Turtoi, Adriana},
     title = {Some maximal graduation classes and their {Riemannian} properties},
     journal = {Archivum mathematicum},
     pages = {31--46},
     publisher = {mathdoc},
     volume = {07},
     number = {1},
     year = {1971},
     mrnumber = {0308204},
     zbl = {0236.53024},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1971__7_1_a4/}
}