60a1537d4d gussaff
https://colab.research.google.....com/drive/1XeVDlsXNi
https://colab.research.google.....com/drive/1eOyY3spCT
https://colab.research.google.....com/drive/1jsVsYLeeq
https://colab.research.google.....com/drive/1Gos1afRRe
https://colab.research.google.....com/drive/1v6qVzulbU
http://hmj.matematika.um.ac.id/?p=1481