On a property of the $n$-dimensional cube - Rafayel R. Kamalian; Arpine Khachatryan (CoRR, 2011)

On the parameter μ21 of a complete bipartite graph - Arpine Khachatryan; Rafayel R. Kamalian (CoRR, 2012)

On the extremal values of the number of vertices with an interval spectrum on the set of proper edge colorings of the graph of the $n$-dimensional cube. - A. M. Khachatryan; Rafayel R. Kamalian (CoRR, 2013)

A Description of the Subgraph Induced at a Labeling of a Graph by the Subset of Vertices with an Interval Spectrum. - Narine N. Davtyan; Arpine Khachatryan; Rafayel R. Kamalian (CoRR, 2014)