@article{10_1017_S0017089513000256,
     author = {IVANOV, S. and VASSILEV, D.},
     title = {AN {OBATA-TYPE} {THEOREM} {ON} {A} {THREE-DIMENSIONAL} {CR} {MANIFOLD}},
     journal = {Glasgow mathematical journal},
     pages = {283--294},
     year = {2014},
     volume = {56},
     number = {2},
     doi = {10.1017/S0017089513000256},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089513000256/}
}