DE4237602-A1  DIN 1.4541;  DIN 1.4767;  Fuel Cell Handbook, Appelby and Foulkes, New York 1989WO9411913-A1  "Fuel Cell Handbook", Appelby and Foulkes, New York 1989;  DIN 1.4541;  DIN 1.4767;  CHEMICAL ABSTRACTS, vol. 114, no. 22, 3 June 1991, Columbus, Ohio, US; abstract no. 210620a, MATSUHIRO ET AL "Ceramic air cathodes and fuel cells using these cathodes";  CHEMICAL ABSTRACTS, vol. 114, no. 22, 3 June 1991, Columbus, Ohio, US; abstract no. 210620a, MATSUHIRO ET AL "Ceramic air cathodes and fuel cells using these cathodes" & JP,A,02 288 159 (NGK INSULATORS LTD) 28 November 1990;  CHEMICAL ABSTRACTS, vol. 114, no. 22, 3. Juni 1991, Columbus, Ohio, US; abstract no. 210620a, MATSUHIRO ET AL "Ceramic air cathodes and fuel cells using these cathodes" siehe Zusammenfassung;  MATER. SCI. MONOGR. 66D(CERAM. TODAY - TOMORROW'S CERAM., PT. D) 1991 Seiten 2607 - 14 M. SHIESSL ET AL "CERAMIC CATHODE MATERIALS (La1-uSruMn1-xCox03-delta) FOR SOLID OXIDE OXIDE FUEL CELL (SOFC) APPLICATIONS";  MATER. SCI. MONOGR. 66D(CERAM. TODAY - TOMORROW'S CERAM., PT. D) 1991 pages 2607 - 14 M. SHIESSL ET AL "CERAMIC CATHODE MATERIALS (La1-uSruMn1-xCox03-delta) FOR SOLID OXIDE FUEL CELL (SOFC) APPLICATIONS";  MATER. SCI. MONOGR. 66D(CERAM. TODAY - TOMORROW'S CERAM., PT. D) 1991 pages 2607 - 14 M. SHIESSL ET AL "CERAMIC CATHODE MATERIALS (La1-uSruMn1-xCoxO3-delta) FOR SOLID OXIDE FUEL CELL (SOFC) APPLICATIONS;  PATENT ABSTRACTS OF JAPAN vol. 14, no. 550 (E-1009)6 December 1990;  PATENT ABSTRACTS OF JAPAN vol. 14, no. 550 (E-1009)6 December 1990 & JP,A,02 236 959 (MITSUBISHI HEAVY IND LTD) 19 September 1990;  PATENT ABSTRACTS OF JAPAN vol. 14, no. 550 (E-1009)6. Dezember 1990;  PATENT ABSTRACTS OF JAPAN vol. 16, no. 267 (E-1217)16 June 1992;  PATENT ABSTRACTS OF JAPAN vol. 16, no. 267 (E-1217)16 June 1992 & JP,A,04 062 757 (NAKAGAWA HIROTAKA) 27 February 1992;  PATENT ABSTRACTS OF JAPAN vol. 16, no. 267 (E-1217)16. Juni 1992;  CHEMICAL ABSTRACTS, vol. 114, no. 22, 3. Juni 1991, Columbus, Ohio, US; abstract no. 210620a, MATSUHIRO ET AL 'Ceramic air cathodes and fuel cells using these cathodes' & JP,A,02 288 159 (NGK INSULATORS LTD) 28. November 1990;  MATER. SCI. MONOGR. 66D(CERAM. TODAY - TOMORROW'S CERAM., PT. D) 1991 Seiten 2607 - 14 M. SHIESSL ET AL 'CERAMIC CATHODE MATERIALS (La1-uSruMn1-xCoxO3-delta) FOR SOLID OXIDE FUEL CELL (SOFC) APPLICATIONS';  PATENT ABSTRACTS OF JAPAN vol. 14, no. 550 (E-1009)6. Dezember 1990 & JP,A,02 236 959 (MITSUBISHI HEAVY IND LTD) 19. September 1990;  PATENT ABSTRACTS OF JAPAN vol. 16, no. 267 (E-1217)16. Juni 1992 & JP,A,04 062 757 (NAKAGAWA HIROTAKA) 27. Februar 1992;  See also references of EPA 0667042;  PATENT ABSTRACTS OF JAPAN vol. 16, no. 267 (E-1217)16. Juni 1992&JP,A,04 062 757 (NAKAGAWA HIROTAKA) 27. Februar 1992;  CHEMICAL ABSTRACTS, vol. 114, no. 22, 3. Juni 1991, Columbus, Ohio, US; abstract no. 210620a, MATSUHIRO ET AL 'Ceramic air cathodes and fuel cells using these cathodes'&JP,A,02 288 159 (NGK INSULATORS LTD) 28. November 1990;  PATENT ABSTRACTS OF JAPAN vol. 14, no. 550 (E-1009)6. Dezember 1990&JP,A,02 236 959 (MITSUBISHI HEAVY IND LTD) 19. September 1990;  See also references of EP 0667042A1