Lundberg, U., F. Osborn, Z. Carvajal, A. Gil, B. Guerrero, and C. L. Arocha Piñango. “Isolation and Partial Characterization of a Protease With Kallikrein-Like Activity from the Egg-Nests of Hylesia Metabus (crammer 1775) (Lepidoptera: Saturnidae), Preliminary Communication”. Revista Científica De La Facultad De Ciencias Veterinarias, Vol. 12, no. 2, 1, http://www.produccioncientifica.luz.edu.ve/index.php/cientifica/article/view/14828.