Stephan Eidenbenz Matthew Hennessy Rafael Morales Bueno Francisco Triguero Ruiz Peter Widmayer Ricardo Conejo Preface. 1-2 2004 312 Theor. Comput. Sci. 1 http://dx.doi.org/10.1016/S0304-3975(03)00399-2 db/journals/tcs/tcs312.html#EidenbenzHBRWC04