Permata I, Panglipur I, Hidayatin N. Application of Double Loop Problem Solving to Improve Mathematical Literacy Skills in Junior High School Students in Learning to Build a Flat Side Space. JELMaR [Internet]. 7Nov.2024 [cited 20Dec.2025];5(2):97-03. Available from: https://jelmar.wisnuwardhana.ac.id/index.php/jelmar/article/view/151