@article{MS2_1971__29_166217,
     author = {Halld\'or I. Eliasson},
     title = {On {Variations} of {Metrics.}},
     journal = {Mathematica Scandinavica},
     pages = {317--327},
     publisher = {mathdoc},
     volume = {29},
     year = {1971},
     zbl = {0238.53024},
     url = {http://geodesic.mathdoc.fr/item/MS2_1971__29_166217/}
}