@article {640,
	title = {Rock strength estimation: a PSO-based BP approach},
	journal = {Neural Computing and Applications},
	year = {2016},
	pages = {1{\textendash}12},
	author = {Mohamad, E Tonnizam and Armaghani, D Jahed and Momeni, E and Yazdavar, AH and Ebrahimi, M}
}
