8K Kovari , Ch Amstail , P Fritz. Integrated measuring technique for rock pressure determination[J]. Proc Int Conf on field measurements in rock mechanics, 1977(4) : 4-6.
9G Gioda, L Jurina. Identification of earth pressure on tunnel lines [ J ]. Proceedings of the International Conference on Soil Mechanics and Foundation Engineering,1981 (1) :301 -304.