Citations:hattu


 * 2001 February 15th (9:44am), “ Mikko Silvonen” (user name), sci.lang (Usenet newsgroup), “Re: Czechia”, Message ID: <3A8B88D1.EAA9BEE4@iki.fi>
 * S caron (or hacek; “hattu-s” is what we call it) has been used in foreign words at least since the 1920s (I don’t know its history very well), but it is still not completely established.