van Romburgh
Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, 1881 , vol. 93, p. 847
Jahresbericht ueber die Fortschritte der Chemie und Verwandter Theile Anderer Wissenschaften, 1881 , p. 508
Sernagiotto
Atti della Accademia Nazionale dei Lincei, Classe di Scienze Fisiche, Matematiche e Naturali, Rendiconti, 1919 , vol. <5> 28 I, p. 433
Gazzetta Chimica Italiana, 1920 , vol. 50 I, p. 228
in not given
addition of a small amount of oxalic acid to a solution of ZrOCl2;; precipitate (soluble on stirring); permanent precipitate by further addition of oxalic acid (partially soluble in the formed HCl); washing by decanting and drying at 105°C;;
