The following publications are possibly variants of this publication:
- Call-out Bracket Methods in TimorJames Leslie Keedy, Klaus Espenlaub, Christian Heinlein, Gisela Menger. jot, 5(1):51-67, 2006. [doi]
- Qualifying Types Illustrated by Synchronisation ExamplesJames Leslie Keedy, Gisela Menger, Christian Heinlein, Frans A. Henskens. jit 2003: 330-344 [doi]
- Attribute Types and Bracket ImplementationsJames Leslie Keedy, Mark Evered, Axel Schmolitzky, Gisela Menger. TOOLS 1997: 325-339 [doi]