1. Abramowitz M, Stegun LA (eds) (1964) Handbook of Mathematical Functions with Formulas, Graphs and Mathematical Tables, Applied Mathematics Series 55, Natl. Bur. Standards, U.S. Department of Commerce, Washington, DC (reprinted by Wiley)
2. Achenbach JD (1973) Wave propagation in elastic solids. Elsevier, Amsterdam
3. Aitken AC (1939) Determinants and Matrices. Oliver and Boyd, Edinburgh and London (2nd-8th editions, 1942–56, 9th edition, reset and reprinted, 1967, Greenwood Press, Westport CN, 1983)
4. Anonymous The NASTRAN Theoretical Manual, NASA SP-221 (1970) The NASTRAN User’s Manual, NASA SP-222, 1970; The NASTRAN Programmer’s Manual, NASA SP-223, 1970; The NASTRAN Demonstration Problem Manual, NASA SP-223
5. Archer JS (1963) Consistent mass matrix for distributed mass systems. J ASCE Struct Div 89:161–178