@article{10_4064__41_2_23_30,
     author = {Marek Demia\'nski},
     title = {Cosmological background of gravitational waves},
     journal = {Banach Center Publications},
     pages = {23--30},
     publisher = {mathdoc},
     volume = {41},
     number = {2},
     year = {1997},
     doi = {10.4064/-41-2-23-30},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/-41-2-23-30/}
}