Ashok V. Joshi, Sudhir Kulkarni, Jessie Nachlas, Jordan Diamond, Neill Weber, Anil V. Virkar,
Phase stability and oxygen transport characteristics of yttria- and niobia-stabilized bismuth oxide Journal of Materials Science. ,vol. 25, pp. 1237- 1245 ,(1990) ,
10.1007/BF00585430