1. The Modern Technique of Rock Blasting;Langefors,1978
2. Burden, spacing and borehole diameter at rock blasting;Rustan,1990
3. The design of blasting rounds;Ash,1968
4. Factors influencing blasting results;Fraenkel;Manual on Rock Blasting. Atlas Diesel S. J. Sweden,1952
5. Lislerud A. Personal communication (1984).