no. 2
An abstract Lebesgue-Nikodym theorem
Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche, Série 3, Tome 23 (1969) no. 2, pp. 363-372. 
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     author = {Fishel, B.},
     title = {An abstract {Lebesgue-Nikodym} theorem},
     journal = {Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche},
     pages = {363--372},
     publisher = {Scuola normale superiore},
     volume = {Ser. 3, 23},
     number = {2},
     year = {1969},
     mrnumber = {247023},
     zbl = {0181.14503},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1969_3_23_2_363_0/}
}
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Fishel, B. An abstract Lebesgue-Nikodym theorem. Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche, Série 3, Tome 23 (1969) no. 2, pp. 363-372. http://www.numdam.org/item/ASNSP_1969_3_23_2_363_0/

[B1] N. Bourbaki, Topologie Générale, Chapters I and II, 3rd Edition, Hermann Paris 1961.

[B2] N. Rourbaki, Espaces Vectoriels Topologiques, Chapters I and II, 2nd Edition, Hermann, Paris 1966.

[B3] N. Bourbaki, Intégration, Chapters I-IV 2nd Edition Hermann, Paris 1965 Chapter V, Hermann, Paris 1956.

[F1] B. Fishel, A structure related to the theory of integration, Proc. L.M.S. (3) 14 (1964) 415-30. | MR | Zbl

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[F3] B. Fishel, Division of distributions and the Lebesgue-Nikodym theorem, Math. Annalen 173 (1967) 281-286. | MR | Zbl

[K] G. Köthe, Topologisohe lineare Räume, Springer, Berlin 1960. | MR

[N] M.A. Neumark, Normierte Algebren, Dentscher Verlag der Wissenschaften, Berlin 1965. | MR | Zbl

[R] C.E. Rickart, General theory of Banach algebras, Van Nostrand, Princeton 1960. | MR | Zbl

[S] H.H. Schaefer, Topological Vector Spaces, Macmillan, New York 1966. | MR | Zbl