1. Primary pulmonary vascular obstruction in children;Thilenius, O.G.; Nadas, A.S.; Jockin, H.;Pediatrics,1965
2. Primary pulmonary hypertension with special reference to prognosis;Nielsen, N.C.; Fabricius, J.;Acta Med Scand
3. Primary pulmonary hypertension of unusually long duration;Charters, A.D.; de C, Baker W.;Br Heart J,1970
4. Primary pulmonary hypertension: a pathologic study of the lung vessels in 156 clinically diagnosed cases;Wagenvoort, C.A.; Wagenvoort, N.;Circulation,1970
5. Long-term follow-up in primary pulmonary hypertension;Suarez, L.D.; Sciandro, E.E.; Llera, J.J.; Perosio, A.M.;Br HeartJ,1979