Reproduction of material from the journal in any form requires written permission of the publisher.
Teachers, students and researchers can individually use the materials on Physics-Uspekhi website for noncommercial use in a teaching or research activities.
Îðèãèíàë: Áàðàø Þ Ñ «Ââåäåíèå â ôèçèêó âûñîêîòåìïåðàòóðíûõ ñâåðõïðîâîäíèêîâ» ÓÔÍ 161 (6) 220–223 (1991); DOI: 10.3367/UFNr.0161.199106k.0220