For questions regarding the scientific programme please contact:

Dr. Ratna Yuniati
Email : leaf_comm@sci.ui.ac.id
Phone : +62-813-1168-6128

For technical questions regarding the registration and submission please contact:

The 4th LEAF 2020 Committee
Email : leaf_4th@sci.ui.ac.id
Phone : +62-821-1201-5709 (CP: Diba) (Whatsapp only)
Office Hour : 08.00 am – 04.00 pm / Monday-Friday