Romdon MA, Hamdani D, Medriati R. Gas Concentration Measuring-System (CH4, NH3, CO2) Upon Cow Feces in an Encased-Space Based on Arduino Uno. KPEJ [Internet]. 2024 Jun. 11 [cited 2026 Nov. 15];7(1):97-108. Available from: https://journalfkipunipa.org/index.php/kpej/article/view/502