Harold Abelson Michael Eisenberg Matthew Halfant Jacob Katzenelson Elisha Sacks Gerald J. Sussman Jack Wisdom Kenneth Yip Intelligence in Scientific Computing. 546-562 1989 32 Commun. ACM 5 db/journals/cacm/cacm32.html#AbelsonEHKSSWY89 http://doi.acm.org/10.1145/63485.63486