TY - BOOK AU - JanBen R ED - International Symposium on Trend in Computer Algebra( 1987 : Bad Neuenahr ) ED - International Symposium on Trend in Computer Algebra TI - Trends in computer algebra : proceedings U1 - 4.0151 PY - 1988/// CY - Berlin PB - Springer Verlag KW - Algebra KW - Computer science ER -