by Verna, Didier
Published in arXiv.org (27.03.2018)

by Boender, J, Currie, E, Loomes, M, Primiero, G, Raimondi, F
Published in arXiv.org (29.11.2016)

by Rogers, E.
Published in Proceedings - Frontiers in Education Conference (1997)

by Johnson, Nancy Spurling
Published in CADalyst (01.10.2011)

by Bredt, Thomas H.
Published in Mathematical biosciences (1969)