Wilder apfelbaum -Fotos und -Bildmaterial in hoher Auflösung – Alamy
Combined Analysis of S-Alleles in European Pear by Pollinations and PCR-based S-Genotyping; Correlation between S-Phenotypes and S-RNase Genotypes in: Journal of the American Society for Horticultural Science Volume 133 Issue 2 (2008)