VAN ROOYEN, T.; GOUWS, R. Design of a transmission line monitoring solution for an unmanned quadcopter. Suid-Afrikaans Tydskrif vir Natuurwetenskap en Tegnologie / <i>South African Journal of Science and Technology</i&gt;, v. 33, n. 1, p. 1 bladsy, 31 jul. 2014.