@article{KUKZ_1974_11_11_a17,
     author = {M. F. Kulagina},
     title = {Characteristic singular equations in the case of a countable set of contours with several condensation points},
     journal = {Trudy seminara po kraevym zada\v{c}am},
     pages = {138--143},
     publisher = {mathdoc},
     volume = {11},
     number = {11},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUKZ_1974_11_11_a17/}
}