@article{ZNSL_2003_304_a7,
     author = {K. V. Shahbazyan and Yu. G. Shoukourian},
     title = {EMSO-definability of some languages with event structures},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {128--140},
     year = {2003},
     volume = {304},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2003_304_a7/}
}