@article{TMF_2008_155_1_a0,
     author = {I. Ya. Aref'eva and I. V. Volovich},
     title = {The null energy condition and cosmology},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {3--12},
     publisher = {mathdoc},
     volume = {155},
     number = {1},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2008_155_1_a0/}
}