@article{ZNSL_2003_303_a2,
     author = {A. Vagharshakyan},
     title = {Relationship between discrete and continuous time systems},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {71--88},
     publisher = {mathdoc},
     volume = {303},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2003_303_a2/}
}