On a non-vanishing Ext
Rendiconti del Seminario Matematico della Università di Padova, Tome 109 (2003), pp. 235-239. 
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     author = {Fuchs, Laszlo and Shelah, Saharon},
     title = {On a non-vanishing {Ext}},
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     volume = {109},
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     mrnumber = {1997989},
     zbl = {1073.13005},
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     url = {http://www.numdam.org/item/RSMUP_2003__109__235_0/}
}
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Fuchs, Laszlo; Shelah, Saharon. On a non-vanishing Ext. Rendiconti del Seminario Matematico della Università di Padova, Tome 109 (2003), pp. 235-239. http://www.numdam.org/item/RSMUP_2003__109__235_0/

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