ARHIMEDE

http://www.asociatiaarhimede.ro/index_files/Page381.htm

Sclipirea Mintii, nr. 25/2020

http://www.mateinfo.ro/reviste-de-matematica/revista-de-matematica-sclipirea-mintii-issn-1716-3615/revista-sclipirea-mintii/1133-revista-de-matematica-sclipirea-mintii-nr-25/file?fbclid=IwAR2ZxyekJBJq41mOOZA8zw53kCrYC1w1xwZy83K_G3gEUAQUTkN-d4nhLIA

Sclipirea Mintii, nr. 24

http://www.mateinfo.ro/reviste-de-matematica/revista-de-matematica-sclipirea-mintii-issn-1716-3615/revista-sclipirea-mintii/956-revista-de-matematica-sclipirea-mintii-nr-24/file

The Fibonacci Quarterly, May 2020

https://fq.math.ca/Problems/AdvProbMay2020.pdf

SSMA, May, 2020.

https://www.ssma.org/assets/docs/ProblemSolutionsSection/2020-ProblemSolutions/2020-05-Problem-Solutions.pdf

Gazeta Matematica seria B, nr. 4/2020.

https://ssmr.ro/gazeta/gmb/2020/4/cuprins.pdf