Marina de la Cruz Echeandía Alfonso Ortega de la Puente A Christiansen Grammar for Universal Splicing Systems. 336-345 2009 IWINAC (1) http://dx.doi.org/10.1007/978-3-642-02264-7_35 conf/iwinac/2009-1 db/conf/iwinac/iwinac2009-1.html#EcheandiaP09