Authors: Atanas Dimitrov Hilendarov, Alexandar Asenov Georgiev, Lyubomir Georgiev Chervenkov, Nikolai Sirakov.
Authors: Guzmán-Juárez LA, Galindo-González GS, Hernández-Romano P, Hernández-Culebro J, Torres-Hernández RM.
Authors: Esaull Luciano Soares Campos dos Santos,, Sebastião David Santos-Filho, Regina Dantas Jales.