Habib, Muddasar, Khan, Amad Ullah, Habib, Unsia, AND Memon, Abdul Rehman. "Production of Indigenous and Enriched Khyber Pakhtunkhwa Coal Briquettes: Combustion and Disintegration Strength Analysis" Pakistan Journal of Analytical & Environmental Chemistry [Online], Volume 14 Number 1 (2 December 2013)