@article{10_4153_CJM_2010_013_4,
     author = {Azagra, Daniel and Fry, Robb},
     title = {A {Second} {Order} {Smooth} {Variational} {Principle} on {Riemannian} {Manifolds}},
     journal = {Canadian journal of mathematics},
     pages = {241--260},
     year = {2010},
     volume = {62},
     number = {2},
     doi = {10.4153/CJM-2010-013-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2010-013-4/}
}