1. Andrews, W.H., 1987. Bauxite proppant. US Patent No. 4,713,203.
2. Bicerano, J., 2011. Proppants containing dispersed piezoelectric or magnetostrictive fillers or mixtures thereof, to enable proppant tracking and monitoring in downhole environment. US Patent 8,006,754.
3. Brannon, H.D., Hodge, R.M., England, K.W., 1989. High temperature guar-based fracturing fluid. US Patent No. 4,801,389.
4. Fracture stimulation fundamentals;Britt;J. Nat. Gas. Sci. Eng.,2012
5. Cannan, C., Bartel, L., Palisch, T., Aldridge, D., 2015. Electrically conductive proppant and methods for detecting, locating and characterizing the electrically conductive proppant. US Patent No. 8,931,553.