Löfgren, S. (1987). Phosphorus retention in sediments: Implications for aerobic phosphorus release in shallow lakes. Uppsala University ; Distributor, Almqvist and Wiksell International.
Lua i Stíl Chicago (17ú heag.)Löfgren, Stefan. Phosphorus Retention in Sediments: Implications for Aerobic Phosphorus Release in Shallow Lakes. Uppsala : Stockholm, Sweden: Uppsala University ; Distributor, Almqvist and Wiksell International, 1987.
Lua MLA (8ú heag.)Löfgren, Stefan. Phosphorus Retention in Sediments: Implications for Aerobic Phosphorus Release in Shallow Lakes. Uppsala University ; Distributor, Almqvist and Wiksell International, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.