Yen, Hsu-ChunHsu-ChunYen2009-03-042018-07-062009-03-042018-07-061995https://www.scopus.com/inward/record.uri?eid=2-s2.0-15744394712&doi=10.1016%2f0020-0190%2895%2900168-2&partnerID=40&md5=cb2fcd83e9a0bae87da2ac7778a83239application/pdf626946 bytesapplication/pdfen-USComplexity; Finite automata; Petri net languages; Vector addition system languagesjournal article10.1016/0020-0190(95)00168-22-s2.0-15744394712http://ntur.lib.ntu.edu.tw/bitstream/246246/142310/1/08.pdf