Ереван
NavasardyanKarenA.
Yerevan State University,
1, Alex Manoogian Str., Yerevan, Republic of Armenia, 0025
knavasard@ysu.am
SardaryanTigranHrachaevich
Armenian National Agrarian University,
Republic of Armenia, 0009, Yerevan, Teryan str., 74
Sardaryan.tigran@gmail.com
KhachatryanKhachatur Agavardovich
Institute of Mathematics, National Academy of Sciences of Armenia,
0019, Republic of Armenia, Yerevan, Marshal Baghramyan Avenue, 24/5
Khach82@rambler.ru, Khach82@mail.ru
