TY - GEN DA - 2021 LA - eng PY - 2021 TI - Investigating the blind spot of monitoring systems for article processing charges in full OA journals: An approach for the estimation of publication fees not covered by OpenAPC UR - https://nbn-resolving.org/urn:nbn:de:0070-pub-29545285 Y2 - 2024-11-22T00:56:54 ER -