- Sousa, N. J., E. N. Marques, R. d. M. Correa, and G. M. Otto. 1997. Evaluation of the degree of infestation in stocked timber, in the municipality of Sao Mateus do Sul, Parana State [In Portuguese, with English summary]. Revista do Setor de Ciencias Agrarias 1663-68.
- Sousa, E., and M. Guedes. 1999. Some fungi associated with Platypus cylindrus F. (Coleoptera: Platypodidae) on Quercus suber L.: Toxicity bioassays. Pages 275-278 In Physiology and genetics of tree-phytophage interactions: International Symposium. Proceedings of International Symposium on Physiology and Genetics of Tree-Phytophage Interactions, Gulan, France, August 31 -September 4, 1997. Colloques de l'INRA 90.
- Sousa, E., and P. Luciano. 1995. Les principaux ravageurs du chene liege au Portugal. Leurs relations avec le declin des peuplements. [Principal pests of cork oak in Portugal. Their relation with population decline]. Proceedings of the meeting Integrated Protection in corkoak forests, at Tempio Pausania (Italy), 15-17 September 1994. Bulletin OILB SROP 18:18-23.
- Sousa, E., D. Debouzie, H. Pereira, and P. Luciano. 1995. Le role de l'insecte Platypus cylindrus F. (Coleoptera, Platypodidae) dans le processus de deperissement des peuplements de chene-liege au Portugal. [The role of the insect Platypus cylindrus F. (Coleoptera, Platypodidae) in the decline process of stands of cork oak in Portugal]. Proceedings of the meeting Integrated Protection in cork-oak forests, at Tempio Pausania (Italy), 15-17 September 1994. Bulletin OILB SROP 18:24-37.
- Sousa, N., E. Marques, Correa, R. d. M., and G. Otto. 1997. Evaluation of the degree of infestation in stocked timber, in the municipality of Sao Mateus do Sul, Parana State (In Portuguese, with English summary). Revista do Setor de Ciencias Agrarias 16:63-68.