DOE-MACSYMA: Progress Report. - George J. Carrette; Leo P. Harten (European Conference on Computer Algebra (2), 1985)

The Volume Common to Two Congruent Cylinders. - W. A. Beyer; L. R. Fawcett; Leo P. Harten; Blair K. Swartz (J. Symb. Comput., 1992)