Tulkin Rasulov, Mubina Sharipova. TWO AND THREE PARTICLE BRANCHES OF THE ESSENTIAL SPECTRUM OF A 3×3 OPERATOR MATRICES. Spec. Jour. of Inno. Ref. and Dev. [Internet]. 2022 Oct. 29 [cited 2024 Nov. 25];8:270-4. Available from: https://sjird.journalspark.org/index.php/sjird/article/view/299