@article{KYB_1972_8_4_a3,
     author = {Zabczyk, Jerzy},
     title = {A mathematical correction problem},
     journal = {Kybernetika},
     pages = {317--322},
     year = {1972},
     volume = {8},
     number = {4},
     mrnumber = {0339879},
     zbl = {0245.93029},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1972_8_4_a3/}
}