1. https://pakar.um.ac.id/Data/Peneliti/view/eyJpdiI6IlE5cHFLVUphT2pNaGRjVUhxcFMyUlE9PSIsInZhbHVlIjoiUWJ0d29sVjF2RlYxSUJ1VUY1Mm0xZndHNHlkRWFubmRIdEZGYU9OVW5tWT0iLCJtYWMiOiJkZTIzYTUzZjA2ZTllNjY3OTMyMTQzOWI2ZWQ3ZWMzNDk4ZGNlNGU4YTdhODAwMjg1NzY0N2YwYWI4Y2JlMGMwIiwidGFnIjoiIn0= foto: https://pakar.um.ac.id/Data/Peneliti/foto/196403031988121001 2. https://scholar.google.co.id/citations?hl=id&user=csWln5MAAAAJ