Otto N. Witt (1911). "Obituary notices: Friedrich Konrad Beilstein, 1838-1906; Emil Erlenmeyer, 1825-1909; Rudolph Fittig, 1835-1910; Hans Heinrich Landolt, 1831-1910; Nikolai Alexandrovitsch Menschutkin, 1842-1907; Sir Walter Palmer, Bart., 1858-1910". J. Chem. Soc., Trans. 99: 1646-1668. doi:10.1039/CT9119901646.