@article{JMAG_2011_7_1_a2,
     author = {K. S. Khalina},
     title = {Controllability problems for the non-homogeneous string that is fixed at the right-end point with {Dirichlet} boundary control at the left point},
     journal = {\v{Z}urnal matemati\v{c}eskoj fiziki, analiza, geometrii},
     pages = {34--58},
     year = {2011},
     volume = {7},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JMAG_2011_7_1_a2/}
}