Ngo Manh Tung; Pham Quang Dang; Nguyen Huy Phuong; Nguyen Quang Dich; Le Duc Thinh; Hoang Duc Chinh; Lam, N. T. Sensorless Speed Control of Axial Gap Permanent Magnet Motor Using Sliding Mode Observer. MCA 2022, 3, 23-29.