Fariza Tahi Stefan Engelen Mireille Régnier P-dcfold or How to Predict all Kinds of Pseudoknots in Rna Secondary Structures. 703-716 2005 14 International Journal on Artificial Intelligence Tools 5 http://dx.doi.org/10.1142/S021821300500234X db/journals/ijait/ijait14.html#TahiSR05