@article{10_1017_S0017089516000173,
     author = {VOLKOV, ANDREY and ZUBELEVICH, OLEG},
     title = {LAGRANGIAN {SYSTEMS} {WITH} {NON-SMOOTH} {CONSTRAINTS}},
     journal = {Glasgow mathematical journal},
     pages = {289--298},
     year = {2017},
     volume = {59},
     number = {2},
     doi = {10.1017/S0017089516000173},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089516000173/}
}