Umarov, S., and R. Ismailov. “UDK 541.64:661.18 ANALYSIS OF HYDROXYBENZENE-METHANAL OLIGOMERS USING ¹H NMR SPECTROSCOPY METHODS”. Scientific and Technical Journal of Namangan Institute of Engineering and Technology, vol. 10, no. 1, Mar. 2025, pp. 139-47, doi:10.61151/stjniet.v10i1.705.