@article{DAN_1979_249_1_a8,
     author = {A. S. Kuzichev},
     title = {Classes of objects having normal forms in the system of $\lambda$-conversion with logical operators},
     journal = {Doklady Akademii Nauk},
     pages = {41--45},
     publisher = {mathdoc},
     volume = {249},
     number = {1},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1979_249_1_a8/}
}