Harutunyan, G. H., A. G. Movsissyan, and A. S. Piloyan. 2023. “COSMOLOGICAL MODELS IN THE PRESENCE OF SCALAR FIELDS”. Proceedings of the YSU A: Physical and Mathematical Sciences 42 (1 (215). Yerevan, Armenia:47-54. https://doi.org/10.46991/PYSU:A/2008.42.1.047.