@article{SM_1986_53_2_a7,
     author = {A. P. Stolboushkin},
     title = {On the expressive power of some dynamic logics},
     journal = {Sbornik. Mathematics},
     pages = {411--419},
     publisher = {mathdoc},
     volume = {53},
     number = {2},
     year = {1986},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1986_53_2_a7/}
}