@article{AM2_1981__22_136856,
     author = {J. Lawrence},
     title = {The cocycle equation in division rings.},
     journal = {Aequationes mathematicae},
     pages = {70--72},
     publisher = {mathdoc},
     volume = {22},
     year = {1981},
     zbl = {0462.39008},
     url = {http://geodesic.mathdoc.fr/item/AM2_1981__22_136856/}
}