Paper  bibtex   

@misc{thesaurus_indogermanischer_text-_und_sprachmaterialien_titus_nodate,
	title = {{TITUS} {Didactica}: {The} {Development} of {Slavonic} {Alphabets}},
	url = {http://titus.fkidg1.uni-frankfurt.de/didact/idg/slav/slavalpx.htm},
	urldate = {2013-07-20},
	author = {{Thesaurus Indogermanischer Text- und Sprachmaterialien}}
}