%0 Journal Article %A L. Budaghyan %A D. A. Grigoryan %A L. H. Torosyan %T A necessary and sufficient condition for the uniqueness of $\beta\delta$-normal form of typed $\lambda$-terms %J Proceedings of the Yerevan State University. Physical and mathematical sciences %D 2019 %P 28-36 %V 53 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZERU_2019_53_1_a4/ %G en %F UZERU_2019_53_1_a4