by Petrova, Slaveya, Velcheva, Iliana, Nikolov, Bogdan, Angelov, Nikola, Hristozova, Gergana, Zaprjanova, Penka, Valcheva, Ekaterina, Golubinova, Irena, Marinov-Serafimov, Plamen, Petrov, Petar, Stefanova, Veneta, Varbanova, Evelina, Georgieva, Deyana, Stefanova, Violeta, Marhova, Mariyana, Tsankova, Marinela, Iliev, Ivan
Published in Land (Basel) (01.04.2022)

by Zaprjanova, Penka, Hristozova, Gergana
Published in Agricultural Sciences (2018)

by Ivanov, Krasimir, Zaprjanova, Penka, Angelova, Violina, Krustev, Stefan
Published in Communications in Soil Science and Plant Analysis (12.04.2019)

by Ivanov, Krasimir, Zaprjanova, Penka, Petkova, Milena, Stefanova, Violeta, Kmetov, Veselin, Georgieva, Deyana, Angelova, Violina
Published in Spectrochimica acta. Part B: Atomic spectroscopy (01.05.2012)

by Zaprjanova, Penka, Dospatliev, Lilko, Angelova, Violina, Ivanov, Krasimir
Published in Environmental monitoring and assessment (01.04.2010)

by Krustev, Stefan, Angelova, Violina, Zaprjanova, Penka, Nankova, Margarita, Ivanov, Krasimir
Published in Agricultural Sciences (2018)

by Krustev, Stefan, Angelova, Violina, Zaprjanova, Penka, Nankova, Margarita, Ivanov, Krasimir
Published in Acta Scientific Agriculture (24.08.2020)