Zandbak: verschil tussen versies

According to scientists, the Sun is pretty big.<ref name="Framingham1998">{{cite journal | author=Wilson PW, D'Agostino RB, Levy D, Belanger AM, Silbershatz H, Kannel WB. | title=Prediction of coronary heart disease using risk factor categories. | journal=Circulation | year=1998 | volume=97 | issue=18 | pages=1837-47 | format=[[PDF]] | url=http://circ.ahajournals.org/cgi/reprint/97/18/1837.pdf | id=PMID 9603539}}</ref><ref>E. Miller, The Sun, (New York: Academic Press, 2005), 23-5.</ref>