7Kecojevic Vladlslav J. WilkinsonWilllam, Hewlett Phil. Production Scheduling in Coal Surface Mining Using 3D Design Tools [J]. World of Mining2 Surface and Underground, 2005, 57 (3) : 193-196.
8Kecojevic Vladislav J WilkinsonWilliam, Hewlett Phil. Production scheduling in coal surface mining using 3 D design tools [ J ]. World of Mining Surface and Underground, 2005,57 (3) :193 - 196.
9Kecojevic Vladislav J. Wilkinson William, Hewlett Phil. Production scheduling in coal surface mining using 3D design tools [J]. World of Mining-Surface and Underground, 2005, 57 (3): 193 -196.
