Kiyoshi Yamada Takuo Watanabe An Aspect-Oriented Approach to Modular Behavioral Specification. 45-56 2006 163 Electr. Notes Theor. Comput. Sci. 1 http://dx.doi.org/10.1016/j.entcs.2006.07.002 db/journals/entcs/entcs163.html#YamadaW06