Source: https://www.researchgate.net/profile/Ivan-Couee/publication/237065705_Etude_de_l'evolution_d'elements_genetiques_mobiles_application_a_la_decouverte_de_superfamilles_d'helitrons_chez_Arabidopsis_thaliana/links/0deec51b20120539af000000/Etude-de-levolution-delements-genetiques-mobiles-application-a-la-decouverte-de-superfamilles-dhelitrons-chez-Arabidopsis-thaliana.pdf