@inbook{400218, title = {17. Exner an Bolzano}, booktitle = {Bernard Bolzano's Schriften}, series = {GDML\_Books}, publisher = {Kr\'alovsk\'a \v cesk\'a spole\v cnost nauk}, address = {Praha}, year = {1935}, pages = {101-102}, url = {http://dml.mathdoc.fr/item/400218} }
Exner, František. 17. Exner an Bolzano, dans Bernard Bolzano's Schriften, GDML_Books, (1935), pp. 101-102. http://gdmltest.u-ga.fr/item/400218/