Miftahul Walid, Hozairi, and Madukil Makruf. “Analysis and Development of Seawater Density Measurement Algorithms Using Arduino Uno and YL-69 Sensor ”. Jurnal RESTI (Rekayasa Sistem Dan Teknologi Informasi), Vol. 4, no. 5, Oct. 2020, pp. 951-6, doi:10.29207/resti.v4i5.2430.