X-Ray Diffraction Studies of Pyrolytic Products of Phenol-Formaldehyde Resins
Xie De-min, Wang Rong-shun, Zhang Xi-yan, Fu Yu-jie, Wang Cun-guo, Zhao Cheng-da, Mu Zhong-cheng
Chem. J. Chinese Universities . 1991, (8): 1122 -1125 .