@article{IM2_1993_40_2_a5,
     author = {V. A. Smirnov},
     title = {Secondary operations in the homology of the operad $E$},
     journal = {Izvestiya. Mathematics},
     pages = {425--442},
     year = {1993},
     volume = {40},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1993_40_2_a5/}
}