Wanner Gerhard 1993 Solving ordinary differential equations I. Springer Verlag ISBN 978-3-540-56670-0.
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. Wanner Gerhard 1996 Solving ordinary differential equations II. A silver medal performance by University of South Dakota graduate Chris Nilsen earned him a spot as the South Dakota Sports Celebrity of the Year for 2021 as chosen by the South Dakota Sportswriters Association. Stiff and differential-algebraic problems 2nd edición Berlin New.
Nilsen a two-time NCAA champion earned his first US. Olympic Trials championship in.