Annals of the Academy of Romanian Scientists - Series on Mathematics and Its Applications (https://aos.ro/editura/analeleaosr/annals-on-mathematics)
Academy of Romanian Scientists (https://www.aosr.ro/)
American Mathematical Society (https://www.ams.org/home/page)
International Society of Difference Equations (http://isdeds.com/)
European Mathematical Society (http://euro-math-soc.eu/)
Romanian Mathematical Society