@article{IM_1994__115_1_144181,
     author = {Vladimir G. Berkovich},
     title = {Vanishing cycles for formal schemes.},
     journal = {Inventiones mathematicae},
     pages = {539--571},
     publisher = {mathdoc},
     volume = {115},
     number = {1},
     year = {1994},
     zbl = {0791.14008},
     url = {http://geodesic.mathdoc.fr/item/IM_1994__115_1_144181/}
}