KOVÁČ, Gabriel - NAGY, Oskar - SEIDEL, Herbert. Health, reproduction and production in dairy cows with increasing milk production. In: . 23rd World Buiatrics Congress, Quebec City, Canada, July 11-16, 2004. 1. vyd. Ithaca NY : IVIS, 2004. 2004. s. 26.

NOVOTNÝ, Jaroslav - KOVÁČ, Gabriel - LINK, Róbert - JESENSKÁ, Mária - PISTL, Juraj - HÚSKA, Miroslav. Bioplexes trace elements as alternatives to ATB stimulators of growth. In: . Risk factors of food chain. October 7-th, 2004, Nitra. 2004. 2004. ISBN 80-8069-415-X, s. 34.

HIŠČÁKOVÁ, Mária - JESENSKÁ, Mária - KOVÁČ, Gabriel - LINK, Róbert - SEIDEL, Herbert. Concentrations of cadmium and arsenic in milk of dairy cows in Slovakia. In: . Hygiena alimentorum XXV: Actual questions of production and processing of the milk - safe food for everyone, May 26th-28th 2004, Štrbské Pleso, High Tatras : Proceedings of Abstracts. 1. vyd. Košice : UVL, 2004. 2004. ISBN 80-8077-000-X, s. 61.

JESENSKÁ, Mária - HIŠČÁKOVÁ, Mária - KOVÁČ, Gabriel - LINK, Róbert - SEIDEL, Herbert. Concentrations of lead and zinc in milk of dairy cows from three slovakian regions. In: . Hygiena alimentorum XXV: Actual questions of production and processing of the milk - safe food for everyone, May 26th-28th 2004, Štrbské Pleso, High Tatras : Proceedings of Abstracts. 1. vyd. Košice : UVL, 2004. 2004. ISBN 80-8077-000-X, s. 62.

HÚSKA, Miroslav - KOVÁČ, Gabriel - LINK, Róbert - MARETTA, Milan - NOVOTNÝ, Jaroslav - REVAJOVÁ, Viera - KORÉNEK, Marián. Effect of application of Lactobacillus plantarum and E.coli to internal environment of pigs. In: . NEW PERSPECTIVES OF PROBIOTICS, Košice, Slovakia 15th-19th September 2004. Košice, 2004. 2004. s. 113.

LINK, Róbert - KOVÁČ, Gabriel - LINK, Róbert - NOVOTNÝ, Jaroslav - REICHEL, Peter - ZACHAR, Peter. Effect of Bacillus licheniformis on immunity in piglets infected with Salmonela strain. In: . Risk factors of food chain. October 7-th, 2004, Nitra. 2004. ISBN 80-8069-415-X, s. 28.

LINK, Róbert - KOVÁČ, Gabriel - HIŠČÁKOVÁ, Mária - JESENSKÁ, Mária. Improvement of milk digestion with probiotics on basis of bacillus. In: . Hygiena alimentorum XXV: Actual questions of production and processing of the milk - safe food for everyone, May 26th-28th 2004, Štrbské Pleso, High Tatras : Proceedings of Abstracts. 1. vyd. Košice : UVL, 2004. 2004. ISBN 80-8077-000-X, s. 63.

HÚSKA, Miroslav - KOVÁČ, Gabriel - LINK, Róbert - NOVOTNÝ, Jaroslav - REICHEL, Peter - ZACHAR, Peter. Influence of Lactobacillus Reuteri and E.coli administration on internal enviroment in pig. In: . Risk factors of food chain. October 7-th, 2004, Nitra. 2004. 2004. ISBN 80-8069-415-X, s. 18.

LINK, Róbert - KOVÁČ, Gabriel - SEIDEL, Herbert - HÚSKA, Miroslav. New trends in prevention of gastrointestinal diseases of livestock. In: . Risk factors of food chain. October 7-th, 2004, Nitra. 2004. 2004. ISBN 80-8069-415-X, s. 27.

LINK, Róbert - KOVÁČ, Gabriel - SEIDEL, Herbert - PAULÍKOVÁ, Iveta. Preventic and therapeutic effect of Bacillus licheniformis in calves with diarhoe syndrome. In: . Risk factors of food chain. October 7-th, 2004, Nitra. 2004. 2004. ISBN 80-8069-415-X, s. 27.