@book{45806,
	author = {EL-Kholy, M. A. and Kasem, W. T.},
	title = {Taxonomic evaluation using pollen grain sculpture and seed coat characters of 11 taxa of genus hibiscus (Malvaceae) in Egypt},
	url = {http://nile.enal.sci.eg/EALE/2011/AUJAS/1911/1/143.pdf}
}