Sucharita Mitra Mandar Mitra Bidyut Baran Chaudhuri A Rough Set Based Approach for ECG Classification. 157-186 2008 9 T. Rough Sets http://dx.doi.org/10.1007/978-3-540-89876-4_10 journals/trs/2008-9 db/journals/trs/trs9.html#MitraMC08