Gruchała, Wojciech. “Death and Short Mourning – the Real End of Young Poland”. In Requiem, edited by Jarosław Kita and Maria Korybut-Marciniak, 13:357–373. Private Life of Poles in the 19th Century. Poland: Lodz University Press, 2025. Accessed February 8, 2026. https://press.uni.lodz.pl/index.php/wul/catalog/book/1432/chapter/4489.