On the Detection of Falsifications of Writings
Lucas; Chem. Centralb., 1868, 1517.
Knecht-Senefelder; Technol., xxvi, 143.
Moride; Compt. rend., lviii, 367; Ding. poly. Jour. clxxii, 390.
Vorwerk; Ding. poly. Jour., clxxii, 158.
——; Berl. ind. Z., 1864, 41.