@article{IIGUM_2017_20_a4,
     author = {P. S. Petrenko},
     title = {Observability of linear differential-algebraic equations in the class of {Chebyshev} functions},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {61--74},
     publisher = {mathdoc},
     volume = {20},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2017_20_a4/}
}