found: Work cat.: Kni︠a︡zi Masalʹsʹki na Volyni u XVI st. ... 2007:t.p. (Kni︠a︡zi Masalʹsʹki) p. 4 (kni︠a︡zʹ Ivan Fedorovych Masalʹsʹkyĭ)
found: Słownik biograficzny historii Polski, c2005:v. 2, p. 935-936 (lists several members of the Massalski family going back to 1700)
found: Polski słownik biograficzny, 1975:t. 20, p. 133-147 (lists many members of the Massalski family; variant: Mosalski)
found: Lietuviškoji tarybinė enciklopedija, 1981:v. 7, p. 274 (lists members of the Masālskis family)
found: Wikipedia, Sept. 8, 2008(lists various members of the Massalski family; a Polish-Lithuanian noble family)
