Factors affecting junior high school students’ bike to school in Surakarta
link : https://iopscience.iop.org/article/10.1088/1755-1315/426/1/012053/pdf
Analysis of car speed reduction due to concrete speed bumps on local roads in Surakarta city
link : https://iopscience.iop.org/article/10.1088/1755-1315/426/1/012052/meta