In addition we have referred to articles he has written on Huygens, Leibniz, von Staudt, Einstein, Brouwer, Weyl, and van Dantzig .
Sa karagdagan kami ay isinangguni sa mga artikulo na siya ay nakasulat sa Huygens, Leibniz, von Staudt, Einstein, Brouwer, Weyl, at van Dantzig.