@book{55868,
	author = { Naguib, N. Y.,  and Khalil,  M. Y.},
	title = {The influence of indole acetic acid, phenylalanine and methionine on the growth, amino acid and alkaloid production of periwinkle (Catharanthus roseus. G. Donn) plants},
	url = {http://nile.enal.sci.eg/EALE/2003/BFACU/5403/3/217.pdf}
}