Source: https://www.researchgate.net/profile/Cristiane-Martins-9/publication/258098194_Analyse_spatio-temporelle_de_la_cooccurrence_entre_les_belugas_et_le_trafic_maritime_a_l'embouchure_de_la_riviere_Saguenay_de_2003_a_2007/links/57e0b6b108aec6ce9f28f034/Analyse-spatio-temporelle-de-la-cooccurrence-entre-les-belugas-et-le-trafic-maritime-a-lembouchure-de-la-riviere-Saguenay-de-2003-a-2007.pdf