(en) Kirk Semple et Paulina Villegas, « Mexican Butterfly Conservationist Is Found Dead, Two Weeks After Vanishing », The New York Times, (lire en ligne)
theguardian.com
(en) David Agren, « Mexico: defender of monarch butterflies found dead two weeks after he vanished », The Guardian, (lire en ligne)
(en) David Agren, « Second monarch butterfly sanctuary worker found dead in Mexico », The Guardian, (lire en ligne)
time.com
(en) Mark Stevenson (Associated Press), « Mexican Activist Who Devoted His Life to Protecting Monarch Butterflies Found Dead Near Forest Preserve », Time, (lire en ligne)
