BioStor
 | New England spiders of the family Theridiidae J H Emerton (1882) Trans. Conn. Acad. Arts Sci. 6: 1-86 |
 | The spider genera Crustulina and Steatoda in North America, Central America, and the West Indies (Araneae, Theridiidae) H W Levi (1957) Bulletin of The Museum of Comparative Zoology 117: 365-424 |
 | The spider genera Crustulina and Steatoda in North America, Central America, and the West Indies (Araneae, Theridiidae) H W Levi (1957) Bull. Mus. comp. Zool. Harv. 117: 367-424 |