1. Meningeal tumours with extracranial metastases;Christensen;Brit. Journ. of Cancer,1949
2. Cushing , H. Eisenhardt , L. Meningiomas 1938
3. Psammomatous dural endothelioma (meningioma) with metastasis to the liver;Jurow;Arch. Path.,1941
4. Pathology of meningiomas. A study of 121 cases;Lapresle;Am. Journ. Path.,1952
5. Meningeal tumours with extracranial metastasis. With a case report;Ringsted;Acta path. et microbiol. scandinav.,1958