@article{TRSPY_1965_76_a5,
     author = {A. D. Aleksandrov and V. V. Strel'cov},
     title = {The isoperimetric problem and extimates of the length of a~curve on a~surface},
     journal = {Informatics and Automation},
     pages = {67--80},
     publisher = {mathdoc},
     volume = {76},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1965_76_a5/}
}