@article{UZERU_2019_53_1_a4,
     author = {L. Budaghyan and D. A. Grigoryan and L. H. Torosyan},
     title = {A necessary and  sufficient condition for the uniqueness of $\beta\delta$-normal form of typed $\lambda$-terms},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {28--36},
     publisher = {mathdoc},
     volume = {53},
     number = {1},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UZERU_2019_53_1_a4/}
}