Lawrence A. Alice; Christopher S. Campbell (1999). «Phylogeny of Rubus (rosaceae) based on nuclear ribosomal DNA internal transcribed spacer region sequences». American Journal of Botany (Botanical Society of America) 86 (1): 81-97. Bibcode:1999AmJB...86...81A. JSTOR2656957. PMID21680348. doi:10.2307/2656957.
Lawrence A. Alice; Christopher S. Campbell (1999). «Phylogeny of Rubus (rosaceae) based on nuclear ribosomal DNA internal transcribed spacer region sequences». American Journal of Botany (Botanical Society of America) 86 (1): 81-97. Bibcode:1999AmJB...86...81A. JSTOR2656957. PMID21680348. doi:10.2307/2656957.
Lawrence A. Alice; Christopher S. Campbell (1999). «Phylogeny of Rubus (rosaceae) based on nuclear ribosomal DNA internal transcribed spacer region sequences». American Journal of Botany (Botanical Society of America) 86 (1): 81-97. Bibcode:1999AmJB...86...81A. JSTOR2656957. PMID21680348. doi:10.2307/2656957.
Lawrence A. Alice; Christopher S. Campbell (1999). «Phylogeny of Rubus (rosaceae) based on nuclear ribosomal DNA internal transcribed spacer region sequences». American Journal of Botany (Botanical Society of America) 86 (1): 81-97. Bibcode:1999AmJB...86...81A. JSTOR2656957. PMID21680348. doi:10.2307/2656957.