Hanulikova, A., & Hamann, S. (2010). Illustrations of Slovak IPA. Journal of the International Phonetic Association,40(3), 373-378. doi:10.1017/S0025100310000162.
Slovak (sometimes also called Slovakian) is an Indo-European language belonging to the West-Slavic branch, and is most closely related to Czech. Slovak is spoken as a native language by 4.6 million speakers in Slovakia (that is by roughly 85% of the population), and by over two million Slovaks living abroad, most of them in the USA, the Czech Republic, Hungary, Canada and Great Britain (Office for Slovaks Living Abroad 2009).