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Sheffield، Cory S.؛ Westby، Sue M.؛ Smith، Robert F.؛ Kevan، Peter G. (سبتمبر 2008). "Potential of bigleaf lupine for building and sustaining Osmia lignaria populations for pollination of apple". The Canadian Entomologist. ج. 140 ع. 5: 589–599. DOI:10.4039/n08-011. hdl:10214/2430. ISSN:0008-347X.
Sheffield، Cory S.؛ Westby، Sue M.؛ Smith، Robert F.؛ Kevan، Peter G. (سبتمبر 2008). "Potential of bigleaf lupine for building and sustaining Osmia lignaria populations for pollination of apple". The Canadian Entomologist. ج. 140 ع. 5: 589–599. DOI:10.4039/n08-011. hdl:10214/2430. ISSN:0008-347X.