A cyclic inequality
V. G. Drinfel'd

This publication is cited in the following articles:

1. Sergey Sadov, “Lower bound for cyclic sums of Diananda type”, Arch. Math., 106:2 (2016), 135  
2. A. I. Khrabrov, “Vokrug mongolskogo neravenstva”, Matem. prosv., ser. 3, 7, MTsNMO, M., 2003, 149–162