ADRIAN, Leslie. Preliminary Circuit Design for Robotics Environment Mapping Utilizing Ambient Light, Reflected Light and Stationary Infrared Radiation. Electrical, Control and Communication Engineering, Riga, Latvia, v. 29, n. 1, p. 123–128, 2011. DOI: 10.2478/v10144-011-0021-y. Disponível em: https://ecce-journals.rtu.lv/ecce/article/view/v10144-011-0021-y.. Acesso em: 7 mar. 2026.