Identification of genetic diversity of porcine Norovirus and Sapovirus in Korea - Young-Jo Song; Je-Nam Yu; Hae-Mi Nam; Hyoung-Rok Bak; Joong-Bok Lee; Seung-Yong Park; Chang-Seon Song; Kun-Ho Seo; In-Soo Choi (Virus Genes, 2011)