مفارقة ورقة الشاي: الفرق بين النسختين

* {{cite news|url=http://www.telegraph.co.uk/scienceandtechnology/science/sciencenews/3291786/Dr-Roger%27s-Home-Experiments.html|title=Dr Roger's Home Experiments|last=Highfield|first=Roger|date=14 January 2008|publisher=[[Theديلي Daily Telegraphتلغراف]]|accessdate=2008-12-28}}