Study of Blue Compact Dwarf Galaxies at Redshift 0.2 ~ 0.5 Using SDSS DR7 J. Chung, E.-C. Sung, S.-C. Rey, S. Kim, Y. Lee and J. Kyeong EAS Publications Series, 48 (2011) 127-128 Published online: 11 July 2011 DOI: 10.1051/eas/1148028