Li Gongsheng Cheng Jin Yao De Liu Hongliang Liu Jijun One-dimensional equilibrium model and source parameter determination for soil-column experiment. 1365-1374 2007 190 Applied Mathematics and Computation 2 http://dx.doi.org/10.1016/j.amc.2007.02.064 db/journals/amc/amc190.html#GongshengJDHJ07