1. C.Q. Zhang, M.X. Li: On the status quo and development trend of paver [J]. Construction Machinery Technology & Management, (2004) No. 10, pp.64-65. (In Chinese).
2. X.R. Zhang: Asphalt paver automatic leveling control system and its development [J]. Road Machinery & Construction Mechanization, (2005) No. 5, pp.1-4. (In Chinese).
3. G.H. Zhang, K.Z. He: Analysis and comparison of the height sensor in the paver automatic leveling system. Road Machinery & Construction Mechanization, (1996) No. 6, pp.12-13. (In Chinese).
4. X.R. Zhang: Asphalt Concrete Paver kinetic model and automatic leveling digital controller (Ph.D., Xi'an Highway University, China 2000), p.3. (In Chinese).
5. G.M. Lv, H.H. Shi, C.X. Gu: Study of PID simulation technology used in the paver longitudinal automatic leveling system. Construction machinery, (2006) No. 4, pp.28-31. (In Chinese).