http://www.xtec.net/col-anunciata-cerdanyola/plantes/galzeran.htm
http://ca.wikipedia.org/wiki/Galzeran
http://www.botanical-online.com/galzeran.htm
http://ichn.iec.cat/bages/alzinar/img11.htm
http://www.zonaverde.net/ruscusaculeatus.htm
http://www.plant-identification.co.uk/skye/liliaceae/ruscus-aculeatus.htm