Unsuitability of Using Superposition Principle to Solve Equation Incorporated with Threshold Pressure Gradient
Li Daolun1，2*, Yang Jinghai3, Zha Wenshu2, Wang Lei4, Lu Detang1
西南石油大学学报(自然科学版) . 2015, (4): 81 -89 .  DOI: 10.11885/j.issn.1674-5086.2014.11.28.01