@article {200271,
	title = {A chaos study of tumor and effector cells in fractional tumor-immune model for cancer treatment},
	journal = {Chaos, Solitons \& Fractals},
	volume = {141},
	year = {2020},
	pages = {110321},
	author = {Kumar, Sunil and Ajay Kumar and Bessem Samet and JF G{\'o}mez-Aguilar and M. S. Osman}
}
