Algebraic sum of unbounded normal operators and the square root problem of Kato
Rendiconti del Seminario Matematico della Università di Padova, Tome 110 (2003), pp. 269-275.
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     author = {Diagana, Toka},
     title = {Algebraic sum of unbounded normal operators and the square root problem of {Kato}},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {269--275},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {110},
     year = {2003},
     mrnumber = {2033011},
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     url = {http://archive.numdam.org/item/RSMUP_2003__110__269_0/}
}
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Diagana, Toka. Algebraic sum of unbounded normal operators and the square root problem of Kato. Rendiconti del Seminario Matematico della Università di Padova, Tome 110 (2003), pp. 269-275. http://archive.numdam.org/item/RSMUP_2003__110__269_0/

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