Hultberg, S.U.,
1985a
Pithonella organica - a new calcareous dinoflagellate with an inner organic wall.
In: Hultberg, S.U., Dinoflagellate Studies of the Upper Maastrichtian and Danian in Southern Scandinavia, p.24-32; Department of Geology, University of Stockholm, Stockholm, Sweden. (Published thesis.)