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@article{10_21136_MB_2009_140674, author = {Bullen, P. S.}, title = {Accentuate the negative}, journal = {Mathematica Bohemica}, pages = {427--446}, publisher = {mathdoc}, volume = {134}, number = {4}, year = {2009}, doi = {10.21136/MB.2009.140674}, mrnumber = {2597237}, zbl = {1212.26041}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.2009.140674/} }
Bullen, P. S. Accentuate the negative. Mathematica Bohemica, Tome 134 (2009) no. 4, pp. 427-446. doi : 10.21136/MB.2009.140674. http://geodesic.mathdoc.fr/articles/10.21136/MB.2009.140674/
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