Lihong Zhu Y. Huang Ruihe Wang Jing-yin Wang A mathematical model of the motion of cutting particles in reverse circulation air drilling. 192-202 2015 256 Appl. Math. Comput. https://doi.org/10.1016/j.amc.2014.12.153 db/journals/amc/amc256.html#ZhuHWW15