article in Otto's encyclopedia
book edition published in 1893
book edition published in 1903
book edition published in 1923
book edition published in 1913
book edition published in 1905–1906
book edition published in 1902
book edition published in 1904
book edition published in 1910
book edition published in 1909
book edition published in 1898
book edition published in 1895
book edition published in 1916