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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.

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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.

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LINK, Róbert - KOVÁČ, Gabriel - JESENSKÁ, Mária. Probiotic as alternative to antibiotic use for growth promotion in agriculture. In: . NEW PERSPECTIVES OF PROBIOTICS, Košice, Slovakia 15th-19th September 2004. Košice, 2004. 2004. s. 87.

LINK, Róbert - KOVÁČ, Gabriel - HIŠČÁKOVÁ, Mária. The effect of Bacillus licheniformis administration on average daily gain and feed utilization in pigs. In: . NEW PERSPECTIVES OF PROBIOTICS, Košice, Slovakia 15th-19th September 2004. Košice, 2004. 2004. s. 85.

LINK, Róbert - KOVÁČ, Gabriel. The mechanism of the effect of probiotics on basis of genus bacillus. In: . NEW PERSPECTIVES OF PROBIOTICS, Košice, Slovakia 15th-19th September 2004. Košice, 2004. 2004. s. 86.

LINKOVÁ, Anna - LINK, Róbert. Hepatotoxicita liečiv. In: Orbis Medicinae. 2004. ISBN 80-89203-02-7, Roč. 5, č. 1(2004), s. 17-22.