كلية طب الأسنان
http://www.biomedcentral.com/1472-6963/9/213
http://www.biomedcentral.com/1471-2458/8/286
http://www.biomedcentral.com/1472-6831/9/30
http://adr.sagepub.com/cgi/pmidlookup?view=long&pmid=21441492
http://www.uib.no/smi/en/resources/centre-library/the-mahmoud-salih-collection