On the Complexity of Quaternion Multiplication. - Hans F. de Groote (Inf. Process. Lett., 1975)

On Varieties of Optimal Algorithms for the Computation of Bilinear Mappings I. The Isotropy Group of a Bilinear Mapping. - Hans F. de Groote (Theor. Comput. Sci., 1978)

On Varieties of Optimal Algorithms for the Computation of Bilinear Mappings. II. Optimal Algorithms for 2x2-Matrix Multiplication. - Hans F. de Groote (Theor. Comput. Sci., 1978)

On Varieties of Optimal Algorithms for the Computation of Bilinear Mappings. III. Optimal Algorithms for the Computation of xy and xy where x, y in M2(K). - Hans F. de Groote (Theor. Comput. Sci., 1978)

Characterization of Division Algebras of Minimal Rank and the Structure of Their Algorithm Varieties. - Hans F. de Groote (SIAM J. Comput., 1983)

A Lower Bound for the Bilinear Complexity of Some Semisimple Lie Algebras. - Hans F. de Groote; Joos Heintz (AAECC, 1985)

Lectures on the Complexity of Bilinear Problems - Hans F. de Groote (Springer, 1987)

On the Complexity of Lie Algebras. - Hans F. de Groote; Joos Heintz; Stefan Möhler; Heinz Schmidt (FCT, 1987)