1. Nowicki B., Pierzynowski R., Spadlo S., 2002, The Method of Production Superficial Layer Using Electrical Discharges. Patent PL 183045,.(In Polish).
2. Spadlo S.: The method of finishing surface, especially with complex shapes. Patent PL 172559.(In Polish).
3. Nowicki B., Pierzynowski R., Spadlo S., 2004, The Superficial Layer of Parts Machined by Brush Electro Discharge Mechanical Machining (BEDMM). Journal Engineering Manufacture. Vol. 218 part B, pp. 1-8.
4. Nowicki B., Pierzynowski R., Spadlo S., 2006, Brush Elektro-Discharge Mechanical Dressing of Ultra Hard Abrasive Wheels. Advances in Manufacturing Science and Technology. Quarterly Polish Academy of Science and Technology Vol. 30 No. 1, pp. 13-28.
5. Spadto S., 2002, Comparative Studies of Brush Electrodischarge Machining With Electrodes of Alloy Steel And Tungsten. Advanced.