@article{VNGU_2013_13_4_a4,
     author = {S. A. Drobyshevich},
     title = {A {Double} {Negation} {Operator} in {Logic} $N^*$},
     journal = {Sibirskij \v{z}urnal \v{c}istoj i prikladnoj matematiki},
     pages = {68--83},
     publisher = {mathdoc},
     volume = {13},
     number = {4},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VNGU_2013_13_4_a4/}
}