Não informado. (1987). Key abstracts. Institute of Electrical and Electronics Engineers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Key Abstracts. Piscataway, NJ: Institute of Electrical and Electronics Engineers, 1987.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Key Abstracts. Institute of Electrical and Electronics Engineers, 1987.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.