@article{ Solr-acta13509, title = {On orthocentric simplexes}, series = {Acta litterarum ac scientiarum Regiae Universitatis Hungaricae Francisco-Josephinae : Sectio scientiarum mathematicarum}, author = {Egerváry Jenő}, year = {1940}, url = {http://acta.bibl.u-szeged.hu/13509/1/math_009_218-226.pdf} }