@article{SM_2012_203_12_a7,
     author = {V. E. Fedorov and B. Shklyar},
     title = {Exact null controllability of degenerate evolution equations with scalar control},
     journal = {Sbornik. Mathematics},
     pages = {1817--1836},
     publisher = {mathdoc},
     volume = {203},
     number = {12},
     year = {2012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2012_203_12_a7/}
}