1. I. Krastev, T. Valkova, A. Zielonka, Structure and Properties of Electrodeposited Silver-Bismuth Alloys, Journal of Applied Electrochemistry, 34, 1, (2004), 79-85.

2. Ts. Dobrovolska, I. Krastev, A. Zielonka, Indiumabscheidung aus alkalischen Elektrolyten. Teil I: Indiumabscheidung aus schwach alkalischen cyanidischen Elektrolyten, Galvanotechnik, 95, 4, (2004), 872.

3. Ts. Dobrovolska, I. Krastev, A. Zielonka, Indiumabscheidung aus alkalischen Elektrolyten. Teil II: Untersuchung der Indiumabscheidung aus stark alkalischen cyanidischen Elektrolyten mit zyklischer Voltammetrie, Galvanotechnik, 95, 5, (2004), 1134.

4. И. Кръстев... на български...., Technomat&Infotel 2004 - Materials, Methods and Technology, Scientific articles, published by Science invest Ltd - branch Bourgas, Bulgaria, Vol. 1 ISBN 954 9368 05X, 232-241.

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6. Tz. Boiadjieva, D. Kovacheva, K. Petrov, S. Hardcastle, A. Sklyarov, M. Monev, Electrodeposition, composition and structure of Zn-Cr alloys, Journal of Applied Electrochemistry, 34, (3), (2004), 315.

7. Tz. Boiadjieva, D. Kovacheva, K. Petrov, S. Hardcastle, M. Monev, Effect of anodic treatment on the composition and structure of electrodeposited Zn-Cr alloy coatings, Corrosion Science, 46, (3), (2004), 681.

8. Tz. Boiadjieva, M. Monev, Bestimmung von Zn(II) und Cr(III) in Elektrolyten zur Abscheidung von Zn/Cr Legierungsschichten, Galvanotechnik, 95, (2004), 1848.

9. на български...., Scientific Proceedings of the scientific-technical Union of mechanical engineering, Year XI, Vol. 5/73, September 2004, Section III, 246.

10. A.Hrussanova, L. Mirkova, Ts. Dobrev, S. Vasilev, Influence of temperature and current density on oxygen overpotential and corrosion rate of Pb-Co3O4, Pb-Ca-Sn, and Pb-Sb anodes for copper electrowinning: Part I, Hydrometallurgy, 72, (2004), 205-213.

11. A.Hrussanova, L. Mirkova, Ts. Dobrev, Influence of additives on the corrosion rate and oxygen overpotential of Pb-Co3O4, Pb-Ca-Sn, and Pb-Sb anodes for copper electrowinning: Part II, Hydrometallurgy , 72, (2004), 215-224.

12. Plamen D. Tsokov, Vladimir N.Blaskov, Yavor Sv. Stefanov, Tsvetan M. Dobrev, Synthesis of Cobalt Titanates and their Stability in Sulphate Solutions, TECHNOMAT & INFOTEL 2004, Slunchev Brjag, 6-10 September 2004; published in the Electronic Journal "International Research Publication", vol. 1- ISSN 954 9368 05 X, p.p. 121 - 128.

13. Petrova M., Chemical deposition of metal composite coatings on plastics, Trans. of Inst. of Metal Finishing, , 82, (1-2), (2004), 43.

14. Petrova M., Z. Noncheva, Electroless plating of NiP coatings and composite NiP-TiO2 coatings on copper surfaces, Technomat & Infotel 2004 - Materials, Metods and Technology, Scientific articles Vol.1- ISBN 954 9368 05 X, 254.

15. I.Ivanov, Increase in current efficiency of zinc electrowinning in the presence of metal impurities by addition of organic inhibition additives, Hydrometallurgy, 72, (1-2), 2004, 73-78.

16. A. Hrussanova, E. Guerrini, S. Trasatti, Thermally prepared Ti/RhOx electrodes. IV. O2 evolution in acid solution, JEC, Vol 564C, (2004), 151-157.