AL HADI, Md. Abdullah. Animal Tracking Telemetry Circuit using Low Power FM Transmitter. Engineering International, Dhaka, Bangladesh, v. 4, n. 2, p. 57–62, 2016. DOI: 10.18034/ei.v4i2.187. Disponível em: https://ei.observer/article/view/187. Acesso em: 29 jan. 2026.