Ling Cheung Nancy A. Lynch Roberto Segala Frits W. Vaandrager Switched PIOA: Parallel composition via distributed scheduling. 83-108 2006 365 Theor. Comput. Sci. 1-2 http://dx.doi.org/10.1016/j.tcs.2006.07.033 db/journals/tcs/tcs365.html#CheungLSV06