@article{GDZPPN002221608, title = {Variational theory of Riemannian subspaces.}, journal = {Manuscripta mathematica}, volume = {25}, year = {1978}, pages = {315-330}, zbl = {0396.53012}, url = {http://dml.mathdoc.fr/item/GDZPPN002221608} }
Armsen, Moritz. Variational theory of Riemannian subspaces.. Manuscripta mathematica, Tome 25 (1978) pp. 315-330. http://gdmltest.u-ga.fr/item/GDZPPN002221608/