Ali Mufron
(1), Kailie Maharjan
(2), Elladdadi Mark
(3), Embrechts Xavier
(4)
(1)
Sekolah Tinggi Agama Islam Nahdlatul Ulama Pacitan, Indonesia,
(2)
Technical University of Munich Munich, Germany,
(3)
University of Alberta Edmonton, Canada,
(4)
University of Pennsylvania, United States