International register of cultivar names in the genus Syringa L. (Oleaceae)Freek Vrugtman · First published 1997Open the Tome
Addenda and corrigenda to the tentative international register of cultivar names in the genus Syringa L. (1976)Freek Vrugtman · First published 1990Open the Tome
Corrigenda to the tentative international register of cultivar names in the genus Syringa (Owen M. Rogers, 1976)Freek Vrugtman · First published 1978Open the Tome
