Wayne M. Ahr
Paleoėkologo-litologicheskai͡a sessii͡a (3rd 1965 Sverdlovsk, R.S.F.S.R.)
P. W. Skelton
Dorfsymposium. (7th 1990 Bleiwäsche, Germany)
Jeff Lukasik
Vsesoi͡uznyĭ simpozium po iskopaemym korallam 4th Tiflis 1978.