Muraki, Yoshinao (1997). The umbrella method in tunnelling. M.S. thesis, Massachusetts Institute of Technology. URI: http://hdl.handle.net/1721.1/10740
Muraki, Yoshinao (1997). The umbrella method in tunnelling. M.S. thesis, Massachusetts Institute of Technology. URI: http://hdl.handle.net/1721.1/10740