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2. Stope-and-pillar design for the Elliot Lake uranium mines;Hedley;Bull Can Inst Min Metall,1972
3. Rib pillar design in open stope mining;Potvin;Bull Can Inst Min Metall,1989
4. The use of computer applications at BCL Limited in planning pillar extraction and the design of mine layouts;von Kimmelmann,1984
5. Failure modes and pillar behaviour in the Zinkgruvan mine;Sjöberg,1992