"Celtic" Bulgaria : a select bibliography /
Falileev, A. I.(Aleksandr I.)
Emilov, Julij.
Theodossiev, Nikola.
Institut lingvisticheskikh issledovaniĭ (Rossiĭskai︠a︡ akademii︠a︡ nauk)
Aberystwyth University.Department of Welsh.
St. Petersburg : Nestor-Historia,
2010.
"Institute for Linguistic Studies, Russian Academy of Sciences ; Department of Welsh, Aberystwyth University."
Celts