Olejnik, Oskar. “Wouldn’t Mendelson Work Something Out? – Genesis of Polish Socialist Party of the Prussian Partition in the Light of Connections With London’s Socialists”. Vade Nobiscum, Tom XX 2019: Studia Z Historii Politycznej I Wojskowej, edited by Piotr Budzyński et al., Lodz University Press, 2019, pp. 169-85, https://doi.org/10.18778/8142-717-3.10.