GIELIS J. 2001. De uitvinding van de Circle.

lGIELIS J. 2003. Inventing the Circle.

KIEFER A. 2005. SupergraphX 3D – A Portfolio by Albert Kiefer. SectorA, Venlo, The Netherlands.

TROTT M. 2004. The Mathematica Guidebook for Graphics. Springer Verlag.

VERHULST R. 2006. In de ban van de wiskunde. Garant, Antwerpen.

SZPIRO G. 2006. The secret life of numbers. 50 easy pieces on how mathematicians think. Joseph Henry Press.

D’AMORE B. 2007. Matematica dappertutto. Percorsi matematici inusuali e curiosi
Editore: Pitagora Editrice Bologna.

D’AMORE B. 2008. Matematica en todo. Magisterio Editorial, Bogota.

WEISSTEIN E. (2009) Superellipse. In: CRC Encyclopedia of Mathematics (3rd Edition) Volume III (CRC Press): 3834-3835.

CARATELLI D., GERMANO B., GIELIS J., HE M.X., NATALINI P., RICCI P.E. 2010 Fourier solution of the Dirichlet problem for the Laplace and Helmholtz equations in starlike domains. Lecture Notes of Tbilisi International Centre of Mathematics and Informatics (Tbilisi University Press).

KNILL O. 2004-2010-2011. ENTRY MULTIVARIABLE CALCULUS; Standard glossary of multivariable calculus course as taught at the Harvard mathematics department.

Summer courses
ULRICH W. 2004. Modelling Biology – Basic Applications of Mathematics and Statistics in the Biological Sciences Part I: Mathematics. Introductory Course for Students of Biology, Biotechnology and Environmental Protection, UMK Toru.

STRAUSS R. 2010. Morphometric (quantitative morphology). Texas Tech University, Biology Department.

MASSELIS B., DE PAUW I. 2011. Wiskunde voor Multimedia. Campus Handboek, Lannoo Campus.