Dörhöfer, G. and Davies, E.H. (1980)

Antonescu, E. (1974)

Drugg, W.S. (1978)

Sarjeant, W.A.S. (1966b)

Deflandre, G. (1937a)

Deflandre, G. (1936b)

Davey, R.J. (1970)

Gocht, H. (1957)

Mantell, G.A. (1850)

Evitt, W.R. (1963)

Drugg, W.S. and Loeblich jr, A.R. (1967)

Deflandre, G. (1939a)

Goodman, D.K. and Evitt, W.R. (1981)

Cookson, I.C. and Eisenack, A. (1960a)

Below, R. (1990)

Dutta, S.K. and Jain, K.P. (1980)

Duxbury, S. (1980)

Cookson, I.C. and Eisenack, A. (1960a)

Gocht, H. (1955)

Habib, D. (1973)

Vozzhennikova, T.F. (1965)

Bjærke, T. (1980)

Woollam, R. (1983)

Samoilovitch, S.R. and Mtchedlishvili, N.D. (eds.) (1961)

Cookson, I.C. and Eisenack, A. (1960a)

()

Deflandre, G. (1947d)

Bjærke, T. (1980)

Jiabo (1978)

Jiabo (1978)

He Chengquan (1980)

Lejeune-Carpentier, M. and Sarjeant, W.A.S. (1983)

Harris, W.K. (1974)

Yu Jingxian, Sun Mongrong, Sun Suying and Mao Shaozhi (1981)

Wiggins, V.D. (1973)

Davey, R.J. and Verdier, J.-P. (1976)

Khanna, A.K. and Singh, H.P. (1980)

Morgenroth, P. (1968)

Dörhöfer, G. and Davies, E.H. (1980)

Eisenack, A. (1958)

Vozzhennikova, T.F. (1963)