@unpublished{cantat:hal-02334201,
TITLE = {Four questions, one partial answer},
AUTHOR = {Cantat, Serge},
URL = {https://hal.science/hal-02334201},
NOTE = {working paper or preprint},
YEAR = {2019},
MONTH = Oct, PDF = {https://hal.science/hal-02334201/file/ahl-web.pdf},
HAL_ID = {hal-02334201},
HAL_VERSION = {v1},
}