Franqui, Rosa A., et al. “XYLOSANDRUS COMPACTUS (EICHOFF), COLEOPTERA: SCOLYTIDAE, THE BLACK TWIG BORER ATTACKING COFFEE IN PUERTO RICO”. The Journal of Agriculture of the University of Puerto Rico, vol. 75, no. 2, Apr. 1991, pp. 183-4, doi:10.46429/jaupr.v75i2.3582.