AUTHOR=Halbedel Susanne TITLE=Secretion of Phosphorus by Aquatic Plants Has an Impact on Their Phosphorus Uptake Budget. The Concept of Phosphorus Recycling JOURNAL=Frontiers in Environmental Science VOLUME=6 YEAR=2018 URL=https://www.frontiersin.org/journals/environmental-science/articles/10.3389/fenvs.2018.00023 DOI=10.3389/fenvs.2018.00023 ISSN=2296-665X