The Hankyoreh
A 2017 article in The Hankyoreh said that a group of 7 students from Chonbuk National University did research and case studies in the Philippines related to the Kopino issue for more than a year, and then the group published a book about the Kopino issue which was available as an e-book and a hard copy book which was not for sale. The name of the book was "I'll Keep Watching and Looking After You", and Chonbuk National University has copies of the book in its library.