@article{ZVMMF_1963_3_6_a4,
     author = {Khao Shou},
     title = {The {Sturm-Liouville} difference problem for a fourth order equation with discontinuous coefficients},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1014--1031},
     publisher = {mathdoc},
     volume = {3},
     number = {6},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1963_3_6_a4/}
}