Cantus na trzy chóry mieszane a cappella : for three unaccompanied mixed choirs - Urbaniak, Łukasz 1980- (PWM, Polskie Wydawnictwo Muzyczne, 2020)
Composed in 2018. - Preface by the composer and biographical notes in Polish and English. - Commissioned by the National Forum of Music in Wroclaw for the Polish National Youth Choir