K. Ogasawara, S. Nakajima, H. Sato, and T. Sasaki, “Escherichia coli sterilization using a light-emitting diode and Methylene blue”, Laser Ther, vol. 28, no. 2, pp. 97–102, Jul. 2019, doi: 10.5978/islsm.28_19-OR-05.