Geodesic
The seven-term sequence in the Galois theory of rings
Zapiski Nauchnykh Seminarov POMI, Rings and linear groups, Tome 75 (1978), pp. 127-142

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For any (not necessarily separable) ring extension an exact seven-term sequence of groups is constructed which coincides with the Chase–Rosenberg sequence in all terms except the second and fifth and totally coincides with this sequence if the ring extension is separable. A description is given of the second and fifth terms of the sequence. Bibl. 10 titles. 
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     author = {A. S. Merkur'ev},
     title = {The seven-term sequence in the {Galois} theory of rings},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {127--142},
     publisher = {mathdoc},
     volume = {75},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1978_75_a13/}
}
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A. S. Merkur'ev. The seven-term sequence in the Galois theory of rings. Zapiski Nauchnykh Seminarov POMI, Rings and linear groups, Tome 75 (1978), pp. 127-142. http://geodesic.mathdoc.fr/item/ZNSL_1978_75_a13/