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3. , , and , ‘Isoparametric and associated element famlies for two- and three-dimensional analyses’, Finite Element Methods in Stress Analysis (Ed. Ivar Holland and Kolbein Bell), Tapir, Trondheim, Norway, 1969, pp. 383-432.
4. Economical computer techniques for numerically integrated finite elements
5. ‘Isoparametric and other numerically integrated elements’, Paper presented at the International Symposium on Numerical and Computer Methods in Structural Mechanics, Urbana, Illinois, 1971.