Perroca, Marcia Galan, and Raquel Rapone Gaidzinski. 2002. “Interrater Reliability of the Perroca ’s Instrument for Patients Classification: Assessment”. Revista Da Escola De Enfermagem Da USP 36 (3): 245-52. https://doi.org/10.1590/S0080-62342002000300006.