@article{SM_2002_193_5_a2,
     author = {M. I. Zelikin},
     title = {Chattering  on optimal trajectories of {H\"older} problems},
     journal = {Sbornik. Mathematics},
     pages = {669--683},
     publisher = {mathdoc},
     volume = {193},
     number = {5},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2002_193_5_a2/}
}