1. Baron, F., Michalos, J. P.: Laterally loaded plane structures and structures curved space. Tran. ASCE117, 279?311 (1952).
2. Michalos, J. P.: Numerical analysis of frames with curved girders. Tran. ASCE121, 521?543 (1956).
3. Veltuni, B.: Analysis of continuous circular beams. J. Amer. Conc. Inst.22, 217?228 (1950).
4. Fickel, H. H.: Analysis of curved girders. J. Struct. Div. ASCE85, 113?141 (1959).
5. Patel, J. A.: Analysis of continuous circular beams loaded out of plane. Thesis presented to Oklahoma State University, at Stillwater, Okl. in 1962 in partial fulfullment of the requirements for the degree of Master of Science.