Moreno H., Julia, Víctor Fernández A., Ysaac Chipayo G., and Alberto Crespo P. 2009. “REFERENCE VALUES OF LACRIMAL PRODUCTION THROUGH THE SCHIRMER TEST IN CANINES IN A VETERINARY CLINIC IN LIMA CITY”. Revista De Investigaciones Veterinarias Del Perú 20 (2): 249-53. https://doi.org/10.15381/rivep.v20i2.618.