@article{10_4064_cm_47_1_31_37,
     author = {Wies{\l}aw Grycak and Marian Hotlo\'s},
     title = {On the existence of certain types of {Riemannian} metrics},
     journal = {Colloquium Mathematicum},
     pages = {31--37},
     publisher = {mathdoc},
     volume = {47},
     number = {1},
     year = {1982},
     doi = {10.4064/cm-47-1-31-37},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-47-1-31-37/}
}