Pujadas, Roser;    Valderrama, Erika;    Venters, Will;      (2024)    The value and structuring role of web APIs in digital innovation ecosystems: The case of the online travel ecosystem.                   Research Policy , 53  (2)    , Article 104931.  10.1016/j.respol.2023.104931 <https://doi.org/10.1016/j.respol.2023.104931>.       Green open access