@InProceedings{abadi:abstractaccount, author = "Mart\'{\i}n Abadi and Stephan Merz", title = "An Abstract Account of Composition", year = 1995, editor = "J. Wiedermann and P. Hajek", volume = 969, booktitle = "Mathematical Foundations of Computer Science", series = "Lecture Notes in Computer Science", publisher = "Springer-Verlag", address = "Prague, Czech Republic", pages = "499--508" }