23. Research of the impact of the river Danube on the Srebarna biosphere reserve by the model ecosystem Abramis Brama – macroinvertebrates – sediments

Author: Mariya Chunchukova, Sonya Shukerova, Diana Kirin

33. Potential of sunflower (Helianthus annuus L.) for phytoremediation of soils contaminated with heavy metals

Author: Violina Angelova, Radka Ivanova, Zhivko Todorov, Krassimir Ivanov