Lebesgue A biography from the MacTutor History of Mathematics http://www-history.mcs.st-and.ac.uk/history////Mathematicians/Lebesgue.html St-and.ac.uk~Site InfoWhoisTrace RouteRBL Check
Levy, Paul A biography from the MacTutor History of Mathematics http://www-history.mcs.st-and.ac.uk/history/Mathematicians/Levy_Paul.html St-and.ac.uk~Site InfoWhoisTrace RouteRBL Check
Markov A biography from the MacTutor History of Mathematics http://www-history.mcs.st-and.ac.uk/history//Mathematicians/Markov.html St-and.ac.uk~Site InfoWhoisTrace RouteRBL Check
Radon A biography from the MacTutor History of Mathematics http://www-history.mcs.st-and.ac.uk/history//Mathematicians/Radon.html St-and.ac.uk~Site InfoWhoisTrace RouteRBL Check
Stieltjes A biography from the MacTutor History of Mathematics http://www-history.mcs.st-and.ac.uk/history///Mathematicians/Stieltjes.html St-and.ac.uk~Site InfoWhoisTrace RouteRBL Check
Wiener A biography from the MacTutor History of Mathematics http://turnbull.dcs.st-and.ac.uk/history/Mathematicians/Wiener_Norbert.html St-and.ac.uk~Site InfoWhoisTrace RouteRBL Check