D. J. Mendoza Velazco
University Tecnica of Manabi
Ecuador

Derling Jose Mendoza Velazco – Dr. Sci. (Education), Research Professor, 

 Portoviejo.

Scopus Author ID 57205188813, ResearcherID N-1162-2018.

L. M. Alava Barreiro
University Tecnica of Manabi
Ecuador

Leyla Maria Alava Barreiro – Research Professor, Researcher, Research Department,

Portoviejo.

T. K. Moreira Chica
University Tecnica of Manabi
Ecuador

Tatiana Katiuska Moreira Chica – Research Professor, Researcher, Research Department,

Portoviejo.

E. M. Alcivar Medranda
University Tecnica of Manabi
Ecuador

Eva Margarita Alcivar Medranda – Research Professor, Researcher, Research Department,

Portoviejo.

S. A. Romero Chávez
University Tecnica of Manabi
Ecuador

Sandra Auxiliadora Romero Chávez – Research Professor, Researcher, Research Department,

Portoviejo.