@article{JMAG_2013_9_3_a6,
     author = {A. N. Syrovatsky},
     title = {On the {Perturbation} of {Self-Adjoint} {Operators} with {Absolutely} {Continuous} {Spectrum}},
     journal = {\v{Z}urnal matemati\v{c}eskoj fiziki, analiza, geometrii},
     pages = {392--399},
     year = {2013},
     volume = {9},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JMAG_2013_9_3_a6/}
}