[by] A.T. Dover and F. T. Chapman. by E. B. Uvarov and D. R. Chapman. E.C. Oliver and R.J. Chapman. by A.A. Andronow and C.E. Chaikin. by A. Yariv and J. E. Pearson. by A. C. Ainger and H. G. Wintle. by A. H. Gordon and J. E. Eastoe. by A. H. Sully and E. A. Brandes. by A. P. Dunlop and F. N. Peters. by A.I. Volert and S.I. Hudjaev.