Multi-parameter analysis of AE waveform for identification of fracture modes and behavior in GFRP low-cycle fatigue tests: Progress in Acoustic Emission V. The 10th International Acoustic Emission Symposium, Sendai (Japan), 22–25 Oct. 1990. pp. 552–559. Edited by K. Yamaguchi, H. Takahashi and H. Niitsuma. The Japanese Society for Non-Destructive Inspection (1990)