Trophic Status and Phytoplankton Limitation Conditions in a Few Bulgarian and Hungarian Danube River Wetlands
Kalchev, Roumen, Berczik, Árpád, Beshkova, Michaela, Dinka, Mária, Kalcheva, Hristina, Kiss, Anita, Ágoston-Szabó, Edit
Bacterioplankton from Two Hungarian Danube River Wetlands (Beda-Karapancsa, Danube-Drava National Park) and its Relations to Environmental Variables
Kalcheva, Hristina, Dinka, Mária, Ágoston-Szabó, Edit, Berczik, Árpád, Kalchev, Roumen, Tarjanyi, Nikolett, Kiss, Anita
Trophic Relationships and Status of Reservoirs with and without Occurrence of Dreissena ssp. (Mollusca, Bivalvia) Built on Bulgarian Danube River Tributaries
Kalchev, Roumen, Beshkova, Mihaela, Kalcheva, Hristina
The Effect of Dreissena polymorpha on Bacterioplankton, Nematode Fauna and their Relations to Environmental Factors in Ogosta Reservoir (Danube Basin)
Kalcheva, Hristina, Stoichev, Stefan, Beshkova, Mihaela, Kalchev, Roumen, Stanchkova, Marieta, Kozuharov, Dimitar, Trichkova, Teodora