A. Knapp, and T. Mossakowski. Graph Transformation, Specifications, and Nets - In Memory of Hartmut Ehrig, volume 10800 of Lecture Notes in Computer Science, page 1-25. Springer Verlag, (2018)see also https://arxiv.org/abs/1610.03960.
T. Mossakowski, W. Pawlowski, D. Sannella, and A. Tarlecki. Specification, Algebra, and Software. Essays Dedicated to Kokichi Futatsugi, volume 8873 of Lecture Notes in Computer Science, page 66-91. (2014)
T. Mossakowski. Algebra, Meaning and Computation. Essays Dedicated to Joseph A. Goguen on the Occasion of His 65th Birthday, volume 4060 of Lecture Notes in Computer Science, page 124-149. Springer; Berlin; http://www.springer.de, (2006)
T. Mossakowski, A. Tarlecki, and W. Pawlowski. Category Theory and Computer Science, 7th Int. Conf., volume 1290 of Lecture Notes in Computer Science, page 177--196. Springer Verlag, London, (1997)
O. Kutz, and T. Mossakowski. Modular Ontologies Proceedings of the Fifth International Workshop (WoMO 2011), volume 230 of Frontiers in Artificial Intelligence and Applications, page 94-109. IOS Press, (2011)