Notes on the distribution of the genera Microparacaryum and Paracaryum (Boraginaceae) in Saudi Arabia - Frey, Wolfgang 1942-; Kürschner, Harald 1950- ([Maktab at-Tarbiya al-'Arabī li-Duwal al_Halīǧ], 1990)
Aus: Arab Gulf journal of scientific research. Volume 8 (1990), number 3. - Mit einem abstract in arabischer Sprache.