Evitt, W.R. (1961a)

Morgenroth, P. (1970)

Morgenroth, P. (1970)

Davey, R.J. and Verdier, J.-P. (1973)

Eisenack, A. (1963b)

Wiggins, V.D. (1975)

Eisenack, A. (1938b)

Gerlach, E. (1961)

Vozzhennikova, T.F. (1967)

Duxbury, S. (1977)

Davey, R.J. and Verdier, J.-P. (1971)

Vozzhennikova, T.F. (1963)

Deflandre, G. (1939b)

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

Deflandre, G. (1935)

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

Clarke, R.F.A. and Verdier, J.P. (1967)

Hansen, J.M. (1977)

Deflandre, G. (1935)

Vozzhennikova, T.F. (1967)

Stover, L.E. and Evitt, W.R. (1978)

Stover, L.E. and Evitt, W.R. (1978)

Brideaux, W.W. (1975)

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

Habib, D. (1972)

Cookson, I.C. and Eisenack, A. (1982)

Dörhöfer, G. and Davies, E.H. (1980)

Duxbury, S. (1979a)

Eisenack, A. and Gocht, H. (1960)

Sarjeant, W.A.S. (1981)

Benedek, P.N., Gocht, H. and Sarjeant, W.A.S. (1982)

Liengjarern, M., Costa, L., and Downie, C. (1980)