D. R. Darbinyan, H. G. Sarukhanyan, A. S. Petrosyan, Image Compression System via Orthogonal Transforms (in Russian), SCOR-98, Novosibirsk, Russia, June 22-27.

H. G. Sarukhanyan, D. R. Darbinyan, A. S. Petrosyan, Fast Algorithms of the Block-Diagonal Orthogonal Transforms, DSPA-98, Moscow, Russia, vol. 3-E, pp. 137-141.

K. O. Egiazaryan, A. S. Petrosyan, Super-Resolution from Noisy Image, CSIT-99, Yerevan, Armenia, August 17-22, 1999, pp. 278-282.

A. S. Petrosyan, A Solution of Noisy Image Super-Resolution Problem, DSPA-99, Moscow, Russia, September 21-24, 1999, vol. 2, pp. 296-301.

H. G. Sarukhanyan, D. R. Darbinyan, A. S. Petrosyan, On about a Class of Easily Invertible Matrices, CSIT-99, Yerevan, Armenia, August 17-22, 1999, pp. 235-237.

A. S. Petrosyan, Image Compression, Filtration and Super-Resolution Using Scaled Hadamard Matrices, Pre-print N 2000/1, IIAP NAS RA, Yerevan, Armenia.

A. J. Anoyan, A. S. Petrosyan, H. G. Sarukhanyan, Determination of Recognizable Boundary in noisy communication channels (in Russian), ROAI-6, Russia, 2002.

A. S. Petrosyan, H. G. Sarukhanyan, Implementation of Fast Fourier Transform via Walsh-Hadamard Transform, CSIT-2005, Yerevan, Armenia, September 19-23.

A. S. Petrosyan, H. G. Sarukhanyan, Fast DCT-2 Transform via Hadamard Transform, Mathematical Problems of  Computer Science, 2007.

Armen S. Petrosyan, Fast Hartley Transform via Hadamard Transform, CSIT-2007, Yerevan, Armenia, September 24-28.

Armen S. Petrosyan, Vision System for Disabled People Using Pattern Matching Algorithm, CSIT-2009, Yerevan, Armenia, 28 September – 2 October, pp 343 - 347.

Armen Petrosyan, LCD TV Panel Dead Pixel Inspection System, CSIT-2011, Yerevan, Armenia, September 26-30.