An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Todorova Y, Yotinov I, Topalova Y, Benova E, Marinova P, Tsonev I, Bogdanov T.Todorova Y, et al. Among authors: tsonev i.Environ Technol. 2019 Dec;40(28):3783-3792. doi: 10.1080/09593330.2018.1491631. Epub 2018 Jul 4.Environ Technol. 2019.PMID: 29923777
Klouchek-Popova E, Koleva M, Popov A, Tsonev I, Akhtardzhiev Kh.Klouchek-Popova E, et al. Among authors: tsonev i.Eksp Med Morfol. 1979;18(4):234-9.Eksp Med Morfol. 1979.PMID: 520274Bulgarian.No abstract available.
Petkov V, Ivancheva S, Tsonev I, Klouchek E, Rainova L.Petkov V, et al. Among authors: tsonev i.Eksp Med Morfol. 1974;13(1):29-36.Eksp Med Morfol. 1974.PMID: 4857706Bulgarian.No abstract available.
Petkov V, Ivancheva S, Ognianov I, Tsonev I, Raĭnova L.Petkov V, et al. Among authors: tsonev i.Eksp Med Morfol. 1972;11(2):45-54.Eksp Med Morfol. 1972.PMID: 4681184Bulgarian.No abstract available.