by Almqvist, A., Essel, E.K., Persson, L.-E., Wall, Peter
Published in Tribology international (01.09.2007)

by Almqvist, A, Essel, E K, Fabricius, J, Wall, P
Published in Proceedings of the Institution of Mechanical Engineers. Part J, Journal of engineering tribology (01.11.2008)

by Oguntuase, J. A., Persson, L.-E., Essel, E. K., Popoola, B. A.
Published in Banach journal of mathematical analysis (2008)

by Ezem, B U, Essel, E K, Otubu, J A
Published in East African medical journal (01.08.1980)

by Naandam, S M, Essel, E K, Nortey, S N, Soderbacka, G
Published in Journal of applied mathematics and bioinformatics (01.04.2013)