Anna Nikolaev and Nikolay Nikolaev are researchers who have focused on the historical and cultural ties between Rabindranath Tagore and Bulgaria. Their work, "Rabindranath Tagore and The Bulgarian Connection: Facts and Documents," compiles extensive research conducted at the Rabindra Bhavana Library and Museum, Visva-Bharati University, shedding light on Tagore's interactions with Bulgarian intellectuals and the reception of his work in Bulgaria.