Link: www.villagutta.sk/sk/spravy/2015/07/21/nasa-reflexia-iii-jan-bulla-a-istvan-nagy
Villaguta [online], 21.7.2021
Link: bbonline.sk/jan-bulla-rad-by-som-si-zahral-na-najvacsom-francuzskom-organe-0/
BBonline [online], 12.1.2011
Bibliografia
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2021
Naša reflexia III – Ján Bulla a István Nagy
Link: www.villagutta.sk/sk/spravy/2015/07/21/nasa-reflexia-iii-jan-bulla-a-istvan-nagy
Villaguta [online], 21.7.2021
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2011
FORGÁCS, Jakub: Rád by som si zahral na najväčšom francúzskom organe
Link: bbonline.sk/jan-bulla-rad-by-som-si-zahral-na-najvacsom-francuzskom-organe-0/
BBonline [online], 12.1.2011