Sakagami, Shôichi F. “Techniques for the Observation of Behaviour and Social Organization of Stingless Bees by Using a Special Hive”. Papéis Avulsos de Zoologia 19, no. 1-25 (1966) (August 20, 1966): 151–162. Accessed March 25, 2025. https://revistas.usp.br/paz/article/view/209325.