Eric Reinders: «The Iconoclasm of Obeiance: Protestant Images of Chinese Religion and the Catholic Church», i , Vol. 44, no. 3, Leiden: Brill, 1997, s. 296-322 William Woodville Rockhill: «Diplomatic Missions to the Court of China: The Kotow Question I,» i Vol. 2, No. 3 (Apr., 1897), s. 427–442. William Woodville Rockhill: «Diplomatic Missions to the Court of China: The Kotow Question II,» i Vol. 2, No. 4 (Jul., 1897), s. 627–643.