1. Natural fractures in coal;J Close;AAPG Studies in Geology,1993
2. Controls on coal cleat spacing;G K W Dawson;International Journal of Coal Geology,2009
3. Notes on cleat in the Scottish coalfield;R W Dron;Trans. Inst. Min. Eng,1925
4. Image Processing to Automate Mesh Generation;N V Hattangady;Journal of engineering with computers,1999
5. Coal seam gas and associated water: a review paper;I Hamawand;Renew. Sust. Energ. Rev,2013