Márquez, J.A., Cortés, R., Siller, H.R., Coello, V. and Escamilla, D. 2013. Fuzzy logic scheme for tip-sample distance control for a low cost near field optical microscope. Journal of Applied Research and Technology. 11, 6 (Dec. 2013). DOI:https://doi.org/10.1016/S1665-6423(13)71595-5.