PETROVIČ, Vladimír - PISARČÍKOVÁ, Jana - LAZAR, Gabriel - KOVÁČ, Gabriel. Selenium deficiency in the herds of ruminants in the Slovak Republic. In: . XIth Middle European Buiatrics Congress and 5th Symposium of the European College of Bovine Health Management. Brno, Czech Republik 17-19 June, 2010. Brno : VFU, 2010. 2010. ISBN 978-80-7305-108-2, s. 137.

PETROVIČ, Vladimír - PISARČÍKOVÁ, Jana - LAZAR, Gabriel - KOVÁČ, Gabriel. Effect of chronic generalized trichophytosis on the concentration of elements in the blood serum of calves. In: Folia veterinaria. 2009. ISSN 0015-5748, Roč. 53, Suppl. II (2009), s. 237-239.

NOVOTNÝ, František - POŠIVÁK, Ján - VALOCKÝ, Igor - MORVAYOVÁ, Helena - LAZAR, Gabriel - LEŠO, Boleslav - HURA, Vladimír - VALENČÁKOVÁ, Alexandra - MACÁK, Vladimír - KOVÁČ, Gabriel. Evaluation of changes in metabolic hormones and metabolic indices during physiological and pathological course of puerperium in lactating cows. In: Folia veterinaria. 2009. ISSN 0015-5748, Roč. 53, Suppl. I (2009), s. 45-48.

LAZAR, Gabriel - KOVÁČ, Gabriel - POŠIVÁK, Ján - HORŇÁKOVÁ, Ľubica - POŠIVÁKOVÁ, Serena - NOVOTNÝ, František - MACÁK, Vladimír - PETROVIČ, Vladimír. Hormonal changes in fallow deer (Dama dama) following seasonal anoestrus. In: Folia veterinaria. 2009. ISSN 0015-5748, Roč. 53, Suppl. II (2009), s. 272-273.

MACÁK, Vladimír - REICHEL, Peter - NOVOTNÝ, František - HAJURKA, Jaroslav - VALOCKÝ, Igor - SEIDEL, Herbert - LAZAR, Gabriel - KOVÁČ, Gabriel. Plasma concentrations of nonesterified fatty acids and cholesterol in Slovak spotted dairy cows during pathological puerperium. In: Folia veterinaria. 2009. ISSN 0015-5748, Roč. 53, Suppl. II (2009), s. 134-136.

POŠIVÁK, Ján - LAZAR, Gabriel. Sonografia reprodukčných orgánov kráv [Sonographic examination of cows reproductive organs]. In: Škola - veda - prax II. 25. - 27. 9. 2009, Kosice, SR. Košice : UVL, 2009. 2009. ISBN 978-80-8077-125-6, s. 26-29.

VLČKOVÁ, Radoslava - VALOCKÝ, Igor - LAZAR, Gabriel - MARAČEK, Imrich. Výskyt atrézie folikulov na vaječníkoch oviec po hormonálnom ovplyvnení estru a ovulačného pomeru [Incidence of the follicular atresia on the ewe ovaries after hormonal influence of oeastrus and ovulation rate]. In: XXIII. Dni živočíšnej fyziológie, Smolenice, 22.-24. októbra 2008. Košice : ÚFHZ SAV, 2009. 2009. ISBN 978-80-968618-3-5, s. 100-103.

VLČKOVÁ, Radoslava - VALOCKÝ, Igor - LAZAR, Gabriel - MARAČEK, Imrich. Výskyt atrézie folikulov na vaječníkoch oviec po hormonálnom ovplyvnení estru a ovulačného pomeru. In: ÚFHZ SAV. XXIII. Dni živočíšnej fyziológie. 22.- 24. októbra 2008. Košice : ÚFHZ SAV, 2009. 2009. ISBN 978-80-968618-3-5, s. 22.

NOVOTNÝ, František - REICHEL, Peter - VALOCKÝ, Igor - POŠIVÁK, Ján - KOVÁČ, Gabriel - MORVAYOVÁ, Helena - VALENČÁKOVÁ, Alexandra - LAZAR, Gabriel. Changes of blood concentrations of insulin, insulin-like growth factor-I and metabolic indices of dairy cows with different condition of nutrition. In: 9th Middle European Buiatrics Congress. Budapest, 6-11 July 2008. Budapest : Hungarian Assoication for Buiatrics, 2008. 2008. ISBN 978-963-87942-0-8, s. 110-113.

MACÁK, Vladimír - NOVOTNÝ, František - KOVÁČ, Gabriel - HAJURKA, Jaroslav - LAZAR, Gabriel - VALOCKÝ, Igor - MORDAK, Ryszard. Effect of gestational age on the possibility and accuracy of ultrasonographic fetal sex determination in dairy cows. In: 9th Middle European Buiatrics Congress. Budapest, 6-11 July 2008. Budapest : Hungarian Assoication for Buiatrics, 2008. 2008. ISBN 978-963-87942-0-8, s. 117-119.