Fraterna : official bulletin for International Hoya Association - International Hoya Association. (The Association, 1995)

Fraterna : official bulletin for International Hoya Association - International Hoya Association. (The Association, 1996)

Fraterna : official bulletin for International Hoya Association - International Hoya Association. (The Association, 1997)

Fraterna : official bulletin for International Hoya Association - International Hoya Association. (The Association, 1998)

Fraterna : official bulletin for International Hoya Association - International Hoya Association. (The Association, 1999)