@article{pelayo:hal-00906038,
TITLE = {The affine invariant of generalized semitoric systems},
AUTHOR = {Pelayo, {\'A}lvaro and Ratiu, Tudor S. and Vũ Ngoc, San},
URL = {https://hal.science/hal-00906038},
NOTE = {29 pages, 15 figures},
JOURNAL = {Nonlinearity},
PUBLISHER = {IOP Publishing},
VOLUME = {30},
NUMBER = {11},
PAGES = {3993-4028},
YEAR = {2017},
DOI = {10.1088/1361-6544/aa8aec},
KEYWORDS = {sympletic geometry ; geometric topology},
HAL_ID = {hal-00906038},
HAL_VERSION = {v1},
}