Basic beam theory
Timoshenko, S., Strength of Materials: Part II, Krieger Publishing Co., 1958.
Oden, J. T. and E. A. Ripperger, Mechanics of Elastic Structures, McGraw-Hill, 1981.
Basic computational beam theory
Cook, R. D., D. S. Malkus, and M. E. Plesha, Concepts and Applications of Finite Element Analysis, John Wiley & Sons, 1989.
Hughes, T. J. R., The Finite Element Method, Prentice-Hall Inc., 1987.