For example:
J. Rothe, B. Jacobs, H. Tews, The Coalgebraic Class Specification Language CCSL.
H. Tews, Coalgebraic Methods for Object-Oriented Specification.
B. Jacobs, Objects and classes, co-algebraically.
Posted to theory by Ehud Lamm on 10/14/03; 2:51:52 PM
<http://citeseer.nj.nec.com/jacobs97tutorial.html>