First record of underwater sound produced by the Balkan crested newt (Triturus ivanbureschi) by Simeon Lukanov

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Rice Fields as Important Habitats for Three Anuran Species—Significance and Implications for Conservation by Simeon Lukanov, Andrey Kolev, Blagovesta Dimitrova, Georgi Popgeorgiev

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Contributions to the functional morphology of caudate skulls: kinetic and akinetic forms by Nikolay Natchev, Stephan Handschuh, Simeon Lukanov, Nikolay Tzankov, Borislav Naumov, Ingmar Werneburg

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Influence of the Land Use Type on the Wild Plant Diversity by Ina Aneva, Petar Zhelev, Simeon Lukanov, Mariya Peneva, Kiril Vassilev, Valtcho D. Zheljazkov

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Distribution of the grass snake (Natrix natrix) and dice snake (N. tessellata) in Bulgaria by Yurii V. Kornilev, Georgi Popgeorgiev, Dimitar Plachiyski, Angel Dyugmedzhiev, Vladimir Mladenov, Kostadin Andonov, Simeon Lukanov, Emiliya Vacheva, Miroslav Slavchev, Borislav Naumov

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Analyses of Skin Secretions of <i>Vipera ammodytes</i> (Linnaeus, 1758) (Reptilia: Serpentes), with Focus on the Complex Compounds and Their Possible Role in the Chemical Communica... by Kostadin Andonov, Angel Dyugmedzhiev, Simeon Lukanov, Miroslav Slavchev, Emiliya Vacheva, Nikola Stanchev, Georgi Popgeorgiev, Deyan Duhalov, Yurii V. Kornilev, Daniela Nedeltcheva-Antonova, Borislav Naumov

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