Norman Davies, "God's Playground, a History of Poland: 1795 to the present", Columbia University Press, 1982, pp. 472–473, [2]
Tadeusz Piotrowski, "Poland's holocaust: ethnic strife, collaboration with occupying forces and genocide in the Second Republic, 1918-1947", McFarland, 1998, p. 104, [7]
Marek Jasiak in "Redrawing nations: ethnic cleansing in East-Central Europe, 1944-1948", Philipp Ther, Ana Siljak eds., Rowman & Littlefield, 2001, pp. 175–176, [3]