León, Sergio D., et al. “In Vitro Penetration of Vancomicin through Biofilms of Coagulase Negative Staphylococci Isolated from a Hospital of Lima-Peru”. Ciencia E Investigación, vol. 19, no. 2, Aug. 2017, pp. 84-88, https://doi.org/10.15381/ci.v19i2.13634.