@unpublished{grasland:halshs-02795093, TITLE = {{Much ado about one (single) thing ?}}, AUTHOR = {Grasland, Claude and Vincent, Jean-Marc}, URL = {https://shs.hal.science/halshs-02795093}, NOTE = {working paper or preprint}, YEAR = {2020}, MONTH = Jun, KEYWORDS = {PARIS team ; WP}, HAL_ID = {halshs-02795093}, HAL_VERSION = {v1}, }