*[http://www.biodiversitylibrary.org/search.aspx?SearchTerm=Picea&SearchCat= BHL]
*[http://www.ars-grin.gov/cgi-bin/npgs/html/tax_search.pl?Picea GRIN]
*[http://jeanlouis.helardot.free.fr/page_epiceas/picea_accueil.html Site de Jean-Louis Hélardot]
*[http://www.ipni.org/ipni/simplePlantNameSearch.do?find_wholeName=Picea&output_format=normal&query_type=by_query&back_page=query_ipni.html IPNI]
*[http://mansfeld.ipk-gatersleben.de/pls/htmldb_pgrc/f?p=185:45:1329164412874601::NO::P7_BOTNAME,P7_DB_CHECKBOX1,P7_DB_CHECKBOX2,P7_DB_CHECKBOX4:Picea,,, Mansfeld]