@article{VUU_2009_1_a4,
     author = {V. V. Lukyanov},
     title = {Two-dimensional $\mathrm T$-systems of functions and their application for research of time optimal linear nonstationary control systems},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {101--130},
     publisher = {mathdoc},
     number = {1},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2009_1_a4/}
}