Using basis computation to determine pseudo-multiplicative independence. - H. I. Epstein (SYMSACC, 1976)

A Note on the Complexity of Algebraic Differentiation. - Bob F. Caviness; H. I. Epstein (Inf. Process. Lett., 1978)

A structure theorem for the elementary functions and its application to the identity problem. - H. I. Epstein; Bob F. Caviness (Int. J. Parallel Program., 1979)

A Natural Structure Theorem for Complex Fields. - H. I. Epstein (SIAM J. Comput., 1979)