ALVAREZ-R., J.-A. and SÁNCHEZ-G., G. (1983) “VARIATION IN THE NUMBER OF INSTARS OF Spodoptera frugiperda (J. E. Smith)”, Revista Colombiana de Entomología, 9(1-2-3-4), pp. 43–49. doi: 10.25100/socolen.v9i1-2-3-4.10298.