1. Recurrenslahmung bei Mitralstenose;Ortner N;Wien Klin Wochenschr,1897
2. An epidemiological study of pulmonary arterial hypertension;Peacock AJ;Eur Respir J,2007
3. Primary pulmonary hypertension;Brinton WD;Br Heart J,1950
4. A case of primary pulmonary hypertension with paralysed left vocal cord;Soothill JF;Guys Hosp Rep,1951
5. Ortner's syndrome associated with primary pulmonary hypertension;Kagal AE;J Postgrad Med,1975