@ARTICLE {ORTIZ:2002t, title = {Genetic gains in nordic spring barley breeding (1930s-early 1990s)}, author = {Ortiz, R. and Nurminiemi, M. and Madsen, S. and Rognli, O. and Bj{\o}rnstad, {\AA}. }, journal = {Euphytica}, year = {2002}, volume = {126}, pages = {283--289}, }