1. Amitrano: Rinasc. med. 19, 164 (1942); Zbl. Kinderhk. 40, 519.
2. Barbarani: Boll. Soc. ital. Pediatr. 3, 398 (1934); Zbl. Kinderhk. 30, 148.
3. Cavalotti: Ped. Riv. 47, 770 (1939); Zbl. Kinderhk. 37, 342.
4. Daleas u. Lavergne: Presse Med. 1936, 361; Zbl. Bakt. Abt. Ref., 122, 61.
5. Du Pan: Ann. paediatr. 162, 229 (1944); 164, 20 (1945).