In 1999 Springer published the 1st edition of my book on
Nonsequential Programming (in German),
based on Pascal-FC
by Alan Burns and Geoff Davies, used in their book on Concurrent Programming.
Most of the sources of the 1st edition have been ported to Modula-2 and are parts of Murus;
most of them also to Java (subpackage jMurus.nsp).