@article{UZERU_2018_52_3_a5,
     author = {D. A. Grigoryan},
     title = {On main canonical notion of  $\delta$-reduction},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {191--199},
     publisher = {mathdoc},
     volume = {52},
     number = {3},
     year = {2018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UZERU_2018_52_3_a5/}
}