Gutiérrez-Campos, A., and R. Castillo. “Optical Trapping of Particles at the air/Water Interface for Studies in Langmuir Monolayers”. Revista Mexicana De Física, vol. 56, no. 4, Jan. 2010, pp. 339-0, https://rmf.smf.mx/ojs/index.php/rmf/article/view/3771.