For citations:

Cherentsov D.A., Pirogov S.P., Dorofeev S.M., Cherentsova S.A. RESEARCH OF DAMPED OSCILLATIONS MANOMETRIC SPRING WITH HARD TIP. Oil and Gas Studies. 2017;(1):116-120. (In Russ.) https://doi.org/10.31660/0445-0108-2017-1-116-120