@PhdthesisMisc{D88_898,
author = {Daniel Stoffer},
title = {Some geometric and numerical methods for perturbed integrable systems},
note = {Dis_no 8456, Prof. Dr. Jürg Marti},
school = {ETH Z{\"u}rich},
doi = {http://dx.doi.org/10.3929/ethz-a-000547170},
year = {1988}
}