1. Gui, W., Babuška, I.: Theh, p andh-p versions of, the Finite Element Method for One Dimensional Problem. Part I: The error Analysis of thep-Version Numer. Math.49, 577–612 (1986)
2. Gui, W., Babuška, I.: Theh, p andh-p Version of the Finite Element Method for One Dimensional Problem. Part II. The Error Analysis of theh andh-p Versions. Numer. Math.49, 613–657 (1986)
3. Babuška, I., Miller, A., Vogelius, M.: Adaptive Methods and Error Estimation for Elliptic Problems of Structural Mechanics. In: Adaptive Computational Methods for Patial Differential Equations (I. Babuška, J. Chandra, J.E. Flaherty, eds.) SIAM 33-56 (1983)
4. Babuška, I., Vogelius, M.: Feedback and Adaptive Finite Element Solution for One-dimensional Boundary Value Problems. Numer. Math.44, 75–107 (1984)
5. Zienkiewicz, O.C., Craig, A.W.: Adaptive Mesh Refinement and A Posteriori Error Estimation for thep Version of the Finite Element Method. In: Adaptive Computational Method for P.D.E. (I. Babuška, J. Chandra, J.E. Flaherty, eds.). SIAM 33-56 (1983)