On the problem 12303 from AMM

http://www.ssmrmh.ro/wp-content/uploads/2024/05/ABOUT-THE-PROBLEM-12303-AMM.pdf 

Algebraic inequalities II

http://www.ssmrmh.ro/wp-content/uploads/2024/05/FUNDAMENTAL-SYMMETRIC-POLYNOMIALS-IN-ALGEBRAIC-INEQUALITIES-II.pdf 

SCLIPIREA MINTII, NR. 33, APRILIE, 2024.

https://www.mateinfo.ro/reviste-de-matematica/revista-de-matematica-sclipirea-mintii-issn-1716-3615/revista-sclipirea-mintii/1593-revista-de-matematica-sipirea-mintii-nr-33/file