by R. K. Bhat [and others] by R. J. Eden [and others] by H. W. Babel [and others] by C. H. Bamford and others. by R. V. Ambartsumyan [and others. by Ju Chin Chu and others. by Charles S. Gray and others. by Kao Yu-pao and others. by J.R. Van Wazer [and others]. by Hsiao Kuan-hung and others.