Hovhannisyan, S. R., et al. “METHOD OF FILTRATION OF NATURAL HINDRANCES STUDYING TECTONOMAGNETIC FIELD”. Proceedings of the YSU C: Geological and Geographical Sciences, vol. 46, no. 3 (229), Dec. 2012, pp. 36-42, doi:10.46991/PYSU:C/2012.46.3.036.