Kang Ning Ket Fah Chong Hon Wai Leong De Novo Peptide Sequencing for Mass Spectra Based on Multi-Charge Strong Tags. 287-296 2007 conf/apbc/2007 APBC http://www.comp.nus.edu.sg/~wongls/psZ/apbc2007/apbc105a.pdf db/conf/apbc/apbc2007.html#NingCL07