Authors Year Title
Belka & Korn 1994 Re-Evaluation Of The Early Conodont Succession In The Esla Area Of The Cantabrian Zone (Cantabrian Mountains, Spain).
Belka & Lehmann 1998 Late Viséan/early Namurian conodont succession from the Esla area of the Cantabrian Mountains, Spain.
Acta Geologica Polonica, 48 (1)::31-41, 4 fig., 5 pl.
Belka, Klug & Kaufmann 1999 Devonian conodont and ammonoid succession of the eastern Tafilalt (Ouidane Chebbi section), Anti-Atlas, Morocco. [Z.Belka, C.Klug, B.Kaufmann, D.Korn, S.Döring, R.Feist & J.Wendt].
Acta Geologica Polonica, 49: 1-23, 10 figs., 6 tabls., 5 pls., Warszawa.
Korn, Clausen & Belka 1994 Die Devon/Karbon-Grenze bei Drewer (Rheinisches Schiefergebirge). [D.Korn,C.-D.Clausen,Z.Belka,K.Leuteritz,F.W.Luppold,R.Feist & D.Weyer].
Geologie und Paläontologie in Westfalen, 29: 97-147, 22 figs., 2 tabl., 7 pls., Münster.
Korn, Belka & Fröhlich 2004 The youngest African clymeniids (Ammonoidea, Late Devonian) - failed survivors of the Hangenberg Event.

[D.Korn,  Z.Belka, S.Fröhlich,  M.Rücklin & J.Wendt]
Lethaia 37: 307-315, 8 fig., Oslo.
Korn, Belka & Skompski 2020 First record of the Early Carboniferous ammonoid genus Goniatites from the Greater Karatau (Kazakhstan palaeocontinent)
Palaeobiodiversity and Palaeoenvironments