@article{DAN_1978_242_1_a18,
     author = {I. Ya. Kovalskaya and V. S. Maksakov},
     title = {The effect of {Fresnel} second zone on the shape of seismic pulse},
     journal = {Doklady Akademii Nauk},
     pages = {77--79},
     publisher = {mathdoc},
     volume = {242},
     number = {1},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_242_1_a18/}
}