The best constant in weighted Poincaré and Friedrichs inequalities
Rendiconti del Seminario Matematico della Università di Padova, Tome 92 (1994), pp. 195-208. 
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     author = {Leonardi, Salvatore},
     title = {The best constant in weighted {Poincar\'e} and {Friedrichs} inequalities},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {195--208},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {92},
     year = {1994},
     mrnumber = {1320487},
     zbl = {0822.46034},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1994__92__195_0/}
}
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Leonardi, Salvatore. The best constant in weighted Poincaré and Friedrichs inequalities. Rendiconti del Seminario Matematico della Università di Padova, Tome 92 (1994), pp. 195-208. http://www.numdam.org/item/RSMUP_1994__92__195_0/

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