@article {atef1987some,
	title = {Some cardiovascular and respiratory effects of alfentanil in animals},
	journal = {Deutsche Tieraerztliche Wochenschrift (Germany, FR)},
	year = {1987},
	note = {n/a},
	abstract = {n/a},
	author = {Atef, M. and Youssef, S.A.H and M. A. Shalaby and El-Sayed, MGA and Amin, WA}
}
