Template:Lacaita, 1919
- Lacaita, C.C. 1919. A revision of some critical species of Echium, as examplified in the Linnean and other herbaria; with a description of Echium judaeum, a new species from Palestine. Journal of the Linnean Society. Botany 44(299): 363–438. DOI: 10.1111/j.1095-8339.1919.tb00707.x
BHL
