Navoyan K, Navoyan V. ON THE CONTINUITY OF EXTREMAL LENGTH. Proc. YSU A: Phys. Math. Sci. [Internet]. 2013 Apr. 10 [cited 2024 Jul. 22];47(1 (230):13-6. Available from: https://journals.ysu.am/index.php/proceedings-phys-math/article/view/vol47_no1_2013_pp013-016