3Vdovtsova E A, Koehetkova E A, Limankina N L, et al. Vapor-phase Alkylation of Pyroeatechol and Guaiaeol with Methanol[J]. Khim. Farm. Zh. 1987, 21(12): 1480-1483.
4Bhatnagar S P, Prakash A, Misra S C, et al. Process for Preparation of Monoalkoxyphenols[P]. Indian IN 158895, 1987.