1. 1. S. Kraepelin : Children's Homes for Asthmatics, Proceedings of the International Round Table Friendship Meeting of Allergologists, H. E. Stenfert Kroese N. V. Leiden-Holland, 1956 .
2. ASTHMA IN CHILDREN
3. 4. Turban, and Spengler : Jb. d. Schweiz. Balneolog. Ges.1906 (Quoted by Ruppert2).