@ARTICLE{DasVas_j2004, Author = {J{\"u}rgen~Dassow and Gy{\"o}rgy~Vaszil}, Title = {Multiset splicing systems}, Journal = {Biosystems}, Year = 2004, Volume = 74, Pages = {1--7}, url = {http://dx.doi.org/10.1016/j.biosystems.2003.12.005} }