@article{RM_2010_65_3_a5,
     author = {R. De Leo},
     title = {A note on non-free isometric immersions},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {577--579},
     publisher = {mathdoc},
     volume = {65},
     number = {3},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2010_65_3_a5/}
}