@article {150603,
	title = {Deformation Retract and Topological Folding of Chaotic Schwarzschild Space},
	journal = {International Journal of  Mathematics and computation},
	volume = {17},
	year = {2012},
	pages = {21 - 33},
	author = {A. E. El-Ahmady and G. M. Bahaa and F.A. Abd El-Salam}
}
