@article{10_4153_CJM_1995_036_9,
     author = {Fang, G.},
     title = {On the {Existence} and the {Classification} of {Critical} {Points} for {Non-Smooth} {Functionals}},
     journal = {Canadian journal of mathematics},
     pages = {684--717},
     year = {1995},
     volume = {47},
     number = {4},
     doi = {10.4153/CJM-1995-036-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1995-036-9/}
}