1] Nikolay Panayotov ASSESSMENT OF YIELD AND STABILITY OF PERSPECTIVE BULGARIAN BREEDING LINES PEPPER WITH CONIC SHAPE" - II međunarodni simpozijum i 18-to naučno-stručno savjetovanje agronoma Republike Srpske, 25.02.2013.
(https://ekonferencije.com/en/paper/assessment-of-yield-and-stabil/2096)

2] Nikolay Panayotov ASSESSMENT OF YIELD AND STABILITY OF PERSPECTIVE BULGARIAN BREEDING LINES PEPPER WITH CONIC SHAPE" - II međunarodni simpozijum i 18-to naučno-stručno savjetovanje agronoma Republike Srpske, 25.02.2013.
(https://ekonferencije.com/en/paper/assessment-of-yield-and-stabil/2094)