@article{INTO_2021_198_a14,
     author = {B. I. Efendiev},
     title = {Lyapunov inequality for an ordinary second-order differential equation with a distributed integration operator},
     journal = {Itogi nauki i tehniki. Sovremenna\^a matematika i e\"e prilo\v{z}eni\^a. Temati\v{c}eskie obzory},
     pages = {133--137},
     publisher = {mathdoc},
     volume = {198},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTO_2021_198_a14/}
}