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Veterinarno-Meditsinski Nauki|January 1, 1982
[Activities of glutamate-oxalate and glutamate-pyruvate transaminases, alkaline phosphatase and lactate dehydrogenase in the serum of lambs weaned at different ages]E PetkovaVeterinarno-Meditsinski Nauki|January 1, 1981
[Changes in the blood biochemical indices of lambs weaned at different ages]E Petkova, P Chushkov, E PoshtakovVeterinarno-Meditsinski Nauki|January 1, 1983
[Effect of Bulgarian potassium-calcium zeolites on the assimilation of macro- and trace elements in lambs]E Petkova, T Venkov, Kh StanchevJournal of B.U.ON. : Official Journal of the Balkan Union of Oncology|April 7, 2007
Two cases of radiation-induced cancers 20 years after treatment of first malignanciesV Parvanova, E Petkova, A Tzonevska, et al.Veterinarno-Meditsinski Nauki|January 1, 1982
[Bulgarian potassium-calcium zeolite in the prophylaxis of digestive tract disorders in calves]E Petkova, T Venkov, P Chushkov, et al.Veterinarno-Meditsinski Nauki|January 1, 1981
[Biochemical and hematological indices from the use of a bulgarben preparation in digestive disorders in calves]E Petkova, T Venkov, P Chushkov, et al.Veterinarno-Meditsinski Nauki|January 1, 1982
[Preventive effect of the preparation "Bulgarben" in calves with digestive disorders]E Petkova, T Venkov, P Chushkov, et al.Journal of B.U.ON. : Official Journal of the Balkan Union of Oncology|March 16, 2007
Brachytherapy after laser recanalization versus external beam radiotherapy after laser recanalization versus laser alone in inoperable oesophagocardial cancer: a controlled pilot studyA Chakarova, S Karanov, E Petkova, et al.Veterinarno-Meditsinski Nauki|January 1, 1982
[Prophylactic efficacy of Bulgarian potassium-calcium zeolite in digestion disorders in pigs]E Petkova, T Venkov, P Chushkov, et al.Neuropsychopharmacology : Official Publication of the American College of Neuropsychopharmacology|May 2, 2000
A method to quantify rater bias in antidepressant trialsE Petkova, F M Quitkin, P J McGrath, et al.Pageof 3