1997 IUCN red list of threatened plants (1997)

An environmental profile of the Black Sea Coast - Gillett, Harriet J. (WCMC, 1997)

Index Kewensis plantarum phanerogamarum. nomina et synonyma omnium familiarum et graduum infrafamiliarum ab initio anni MDCCCCLXXI usque ad finem anni MDCCCCLXXV nonnulla etiam antea edita complectens Supplementum sextum decimum - Royal Botanic Gardens, Kew. (e prelo Clarendoniano)

List of rare, threatened and endemic plants in Europe (1982 edition) (1983)

List of rare, threatened and endemic plants in Europe (1982 edition) (1983)

Preliminary draft list of plant species for inclusion in a 'Responsibility List' of European plants - WCMC (WCMC, 1989)