Ichnology of the Cenomanian-Turonian of the Calabar Flank, SE Nigeria = Ichnologie du Cenomanien-Turonien du Calabar Flank, Nigéria du SEETIE BEN AKPAN.Geologie en mijnbouw. 1985, Vol 64, Num 4, pp 365-372, issn 0016-7746Article

Depth distribution of endolithic algae from the Firth of Clyde: implications for delineation and subdivision of the photic zoneETIE BEN AKPAN.Journal of the Marine Biological Association of the United Kingdom. 1986, Vol 66, Num 2, pp 269-275, issn 0025-3154Article

Shell bioerosion in high-latitude low-energy environments: Firths of Clyde and Lorne, Scotland = Bioérosion des coquilles dans des milieux de faible énergie à haute latitude: Firths de Clyde et Lorne, EcosseETIE BEN AKPAN; FARROW, G. E.Marine geology. 1985, Vol 67, Num 1-2, pp 139-150, issn 0025-3227Article