Lessmark, O. (1983). Competition between perch (Perca fluviatilis) and roach (Rutilus rutilus) in south Swedish lakes.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLessmark, Olof. Competition Between Perch (Perca Fluviatilis) and Roach (Rutilus Rutilus) in South Swedish Lakes. 1983.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLessmark, Olof. Competition Between Perch (Perca Fluviatilis) and Roach (Rutilus Rutilus) in South Swedish Lakes. 1983.
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