Rozhnov, M. S., Yu. V. Kuzmenko, D. M. Melnyk, O. S. Levbarg, A. M. Rak, V. I. Pashun, and L. M. Pohribna. “State Primary Standard of Gas Volume and Flow Rate Units for the Pressure Range of 1 MPa to 5 MPa (PVTt-15)”. Metrology and instruments0, no. 2 (May 21, 2020): 3-12. Accessed December 4, 2022. https://mmi-journal.org/index.php/journal/article/view/239.