Source: https://www.researchgate.net/profile/Antonin-Cancino/publication/287646632_Etat_des_lieux_de_l'installation_apicole_professionelle_en_Languedoc-Roussillon/links/56786ba008ae502c99d5701a/Etat-des-lieux-de-linstallation-apicole-professionelle-en-Languedoc-Roussillon.pdf