1. ACHIEZER, N.I., GLASMAN, I.M.: Theorie der linearen Cperatoren im Hilbertraum. Akademie-Verlag, Berlin 1968
2. AHLBERG, J.H, NILSON, E.N., WALSH, J.L.: Best Approximation and Convergence Proper ties of Higher-Order-Spline Approximations. J. Math. Mech. 14 (1965)
3. AHNFP, J.F., KLEINMPN, R.E. The exterior Neumann problem for the Helmholtz equation. Arch. Rational Mech. Anal. 52 (1973), 26–43
4. AHNER, J.F., HSIAO, G.C.: On the Two-Dimensional Exterior Boundary Value Problems of Elasticity. To appear.
5. ALEXIDZE, M.A.: “her die Autoratisierunn der LKsuncr von Panewertaufnahen. Vortrag, Thilisi 1971