Distinguishing areas of organic, biodynamic and conventional farming by means of multispectral images. A pilot study von Atanasova, Dina, Bozhanova, Violeta, Biserkov, Valko, Maneva, Vasilina

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Habitat preferences of diurnal raptors in relation to human access to their breeding territories in the Balkan Mountain Range, Bulgaria von Djorgova, Nadejda, Ragyov, Dimitar, Biserkov, Valko, Biserkov, Jordan, Nikolov, Boris P.

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Trophic status assessment of small turbid lakes comparing remote sensing and in situ data: case study at lower Danube floodplain von Kazakov, Stefan, Biserkov, Valko, Pehlivanov, Luchezar, Nedkov, Stoyan

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TEMPORAL VARIATION IN PREVALENCE AND ABUNDANCE OF METACERCARIAE IN THE PULMONATE SNAIL LYMNAEA STAGNALIS IN CHANY LAKE, WEST SIBERIA, RUSSIA: LONG-TERM PATTERNS AND ENVIRONMENTAL C... von Yurlova, Natalia I, Vodyanitskaya, Svetlana N, Serbina, Elena A, Biserkov, Valko Y, Georgiev, Boyko B, Chipev, Nesho H

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Habitat preferences of diurnal raptors in relation to human access to their breeding territories in the Balkan Mountain Range,Bulgaria von Nadejda Djorgova, Dimitar Ragyov, Valko Biserkov, Jordan Biserkov, Boris P.Nikolov

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Recent ichthyofauna in the wetlands along the Bulgarian section of the Danube von PEHLIVANOV Luchezar, STEFANOV Tihomir, MIHOV Stoyan, BISERKOV Valko, VASSILEV Milen, APOSTOLOU Apostolos, VELKOV Boris

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Temporal variation in prevalence and abundance of metacercariae in the pulmonate snail Lymnaea Stagnalis in Chany Lake, West Siberia, Russia : Long-term patterns and environmental... von YURLOVA, Natalia I, VODYANITSKAYA, Svetlana N, SERBINA, Elena A, BISERKOV, Valko Y, GEORGIEV, Boyko B, CHIPEV, Nesho H

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Current distribution of Zostera seagrass meadows along the SW coast of the Black Sea, Bulgaria von Berov, Dimitar, Vasilev, Vasil, Hiebaum, Georgi, Biserkov, Valko, Deyanova, Diana, Klayn, Stefania, Dimov, Kuzman, Vrabcheva, Yana, Karamfilov, Ventzi

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