@article {Feuillet1986, title = {L{\textquoteright}emploi du parfait en vieux bulgare}, journal = {Palaeobulgarica / Старобългаристика}, volume = {10}, year = {1986}, pages = {35{\textendash}40}, author = {Feuillet, Jack} } @article {Feuillet1978, title = {Les oppositions phonologiques du vieux bulgare}, journal = {Palaeobulgarica / Старобългаристика}, volume = {2}, year = {1978}, pages = {3{\textendash}11}, author = {Feuillet, Jack} }