| MATHEMATICS |
| • | K. A. Keryan, A. L. Khachatryan |
| | A Uniqueness Theorem for Ortho-normal Spline Series |
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| MECHANICS |
| • | Ara S. Avetisyan, S. L. Sahakyan |
| | Reflection and Transmission of Shear Waveforms from the Iinterface between
Two Semi-Infinite Parts of an Elastic Composite Waveguide |
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| ELASTICITY THEORY |
| • | V. S. Torosyan, A. V. Poghosyan |
| | Revealing Stress Features at the Boundary of a Rectangular Domain
in a Problem of Elasticity Theory |
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| • | V. T. Yapujyan |
| | On Forced Oscillations of Orthotropic Layer in the Presence of Internal Friction
and Coulomb Friction Between Layer and Ridge Base |
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| COSMICO OTTICA |
| • | S. V. Avakyan, L. A. Baranova |
| | Energetics of the Relict Microwave Radiation of Universe in the Problem of Space Flights |
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| BIOLOGY |
| • | A. F. Manucharyan |
| | Characteristics of the Epizootic Activity of the Focus of Tularemia in the
Southeastern Region of the Republic of Armenia in 1970-2018 |
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| BOTANY |
| • | Zh. H. Vardanyan, N. N. Muradyan. M. M. Grigoryan, G. G. Gatrchyan |
| | Evaluation of the Ornamental Value of Woody Plants in Order to Create
a Long-Booming Flowering Garden in Armenia |
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| HISTORY |
| • | A. S. Sahakyan |
| | The Chalcedon Version of Agathangelos |
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