Doan Thanh Dat, Le Thi Hong Giang, Nguyen Dinh Dung, Hoang Anh Tuan, & Nguyen Thi Le Hien. (2020). Design and assembly of an apparatus system based on the Villari effect for detecting stress concentration zone on ferromagnetic materials. Petrovietnam Journal, 10, 60 - 66. https://doi.org/10.47800/PVJ.2020.10-06