Kanapieva, F., Z. Zhussipbekova, S. Zhumagazy, and K. Suerbaev. “Syntheses Based on Carbon Oxides. XXXV. Carboxylation of Resorcin and M-Cresol by Sodium Salt of Ethylcarbonic Acid”. Chemical Bulletin of Kazakh National University, Vol. 72, no. 4, Sept. 2013, pp. 38-42, doi:https://doi.org/10.15328/chemb_2013_438-42.