1. Carlos Gaba,Barcelona. Electric parking brake[P]. (ES)US:6863162B1,(2005).
2. Cornelius Peter. Park brake system for vehicles[P]. (DE)US:00841554A1, (2002).
3. Jurgen balz. ELECTRIC PARKING BRAKE[P]. (DE)US:6702405B1,(2004).
4. Cornelius Peter. Drive unit for actuating a parking brake in a vehicle[P]. US:(2005).
5. Sergio Nieto Gil, Zaragoza. Electrically powered parking brake[P]. (ES)US: 0189183A1, (2005).