Validating Concepts from Automated Acquisition Systems. - Albrecht Heeffer (IJCAI, 1985)

On the curious historical coincidence of algebra and double-entry bookkeeping. - Albrecht Heeffer (FotFS, 2008)

A Conceptual Analysis of Early Arabic Algebra. - Albrecht Heeffer (The Unity of Science in the Arabic Tradition, 2008)

Handling Inconsistencies in the Early Calculus. - Jesse Heyninck; Peter Verdée; Albrecht Heeffer (J. Philos. Log., 2018)