WO2004090998-A2  DATABASE INSPEC [Online] THE INSTITUTION OF ELECTRICAL ENGINEERS, STEVENAGE, GB; October 1993 (1993-10), ROGACHEVA E I ET AL: "Concentration anomalies of properties in Pb1-xGexTe solid solutions" XP002296049 Database accession no. 4554393 & XXII INTERNATIONAL SCHOOL ON PHYSICS OF SEMICONDUCTING COMPOUNDS 22-28 MAY 1993 JASZOWIEC, POLAND, vol. 84, no. 4, 22 May 1993 (1993-05-22), pages 729-732, Acta Physica Polonica A Poland ISSN: 0587-4246;  LASHKAREV G V ET AL: "Hot wall growth and properties of lead telluride films doped by germanium and gallium" SEMICONDUCTOR PHYSICS QUANTUM ELECTRONICS & OPTOELECTRONICS NATL. ACAD. SCI. UKR UKRAINE, vol. 3, no. 3, June 2000 (2000-06), pages 295-299, XP002296047 UKRAINE ISSN: 1560-8034;  JAE-SHIK CHOI ET AL: "Thermoelectric properties of n-type (Pb1-xGex)Te fabricated by hot pressing method" XVI ICT '97. PROCEEDINGS ICT'97. 16TH INTERNATIONAL CONFERENCE ON THERMOELECTRICS (CAT. NO.97TH8291) IEEE NEW YORK, NY, USA, 26 August 1997 (1997-08-26), pages 228-231, XP002296046 ISBN: 0-7803-4057-4 cited in the application;  KOHRI H ET AL: "Improvement of thermoelectric properties for n-type PbTe by adding Ge" MATERIALS SCIENCE FORUM TRANS TECH PUBLICATIONS SWITZERLAND, vol. 423-425, 2003, pages 381-384, XP008035344 ISSN: 0255-5476US7326851-B2  Choi, J.-S. et al, "Thermoelectric Properties of n-Type (Pb1-xGex)Te Fabricated by Hot Pressing Method" Proc. 16th International Conference on Thermoelectrics, 228-231. (1997).;  Derwent 2001-426994/46.;  Partin, D.L. "Growth of lead-germanium-telluride thin film structures by molecular beam epitaxy" J. Vac. Sci. Technol., 21(1), May/Jun. 1982. p. 1-5.WO2004090998-A3  JAE-SHIK CHOI ET AL: "Thermoelectric properties of n-type (Pb1-xGex)Te fabricated by hot pressing method" XVI ICT '97. PROCEEDINGS ICT'97. 16TH INTERNATIONAL CONFERENCE ON THERMOELECTRICS (CAT. NO.97TH8291) IEEE NEW YORK, NY, USA, 26 August 1997 (1997-08-26), pages 228-231, XP002296046 ISBN: 0-7803-4057-4 cited in the application;  LASHKAREV G V ET AL: "Hot wall growth and properties of lead telluride films doped by germanium and gallium" SEMICONDUCTOR PHYSICS QUANTUM ELECTRONICS & OPTOELECTRONICS NATL. ACAD. SCI. UKR UKRAINE, vol. 3, no. 3, June 2000 (2000-06), pages 295-299, XP002296047 UKRAINE ISSN: 1560-8034;  KOHRI H ET AL: "Improvement of thermoelectric properties for n-type PbTe by adding Ge" MATERIALS SCIENCE FORUM TRANS TECH PUBLICATIONS SWITZERLAND, vol. 423-425, 2003, pages 381-384, XP008035344 ISSN: 0255-5476;  DATABASE INSPEC [Online] THE INSTITUTION OF ELECTRICAL ENGINEERS, STEVENAGE, GB; October 1993 (1993-10), ROGACHEVA E I ET AL: "Concentration anomalies of properties in Pb1-xGexTe solid solutions" XP002296049 Database accession no. 4554393 & XXII INTERNATIONAL SCHOOL ON PHYSICS OF SEMICONDUCTING COMPOUNDS 22-28 MAY 1993 JASZOWIEC, POLAND, vol. 84, no. 4, 22 May 1993 (1993-05-22), pages 729-732, Acta Physica Polonica A Poland ISSN: 0587-4246