Completorium: Polish Early Music - Spans time from the Middle Ages through the Baroque Period with biographies, MIDI audio, essays, and source material. Presented by Adam Jarczyk and Bogusław Krawczyk. - http://www.completorium.republika.pl/
Poland's Contribution to Music - Article by Felix Labunski reprinted in Polish Music Journal, Volume 5, Number 2, Winter 2002. Originally published in The Polish Review 4, Number 17. - http://www.usc.edu/dept/polish_music/PMJ/issue/5.2.02/polandlabunski.html