@article{RM_1981_36_6_a20,
     author = {L. B. Sofman},
     title = {On~the asymptotic behaviour of the $\varepsilon,\delta$-entropy and 
},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {199--200},
     publisher = {mathdoc},
     volume = {36},
     number = {6},
     year = {1981},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1981_36_6_a20/}
}