Antoon Goderis Christopher X. Brooks Ilkay Altintas Edward A. Lee Carole A. Goble Composing Different Models of Computation in Kepler and Ptolemy II. 182-190 2007 conf/iccS/2007-3 International Conference on Computational Science (3) https://doi.org/10.1007/978-3-540-72588-6_33 db/conf/iccS/iccS2007-3.html#GoderisBALG07