TY - JOUR T1 - The Theory of Classification Part 18: The Theory of Classification Part 18: Polymorphism through the Looking Glass . JO - The Journal of Object Technology UR - http://dx.doi.org/10.5381/jot.2005.4.4.c1 PY - 2005/01/01 AU - Simons AJH ED - DO - DOI: 10.5381/jot.2005.4.4.c1 PB - AITO - Association Internationale pour les Technologies Objets VL - 4 IS - 4 SP - 1 EP - 1 Y2 - 2025/06/28 ER -