KARLSSON, Bo. Clone testing and genotype x environment interaction in Picea abies : doctoral thesis Swedish University of Agricultural Sciences. Umeå : Swedish University of Agricultural Sciences, 2000. 1 zv. (rôzne stránkovanie). Acta Universitatis Agriculturae Suecidae, 162. ISBN 91-576-5896-X. ISSN 1401-6230.