Thompson , Kevin. “The Problem and the Solution : The Optics Behind the Hubble 1st Servicing Mission ”. Physicae Proceedings, vol. 1, nº 1, abril de 2011, p. 1-1, https://econtents.bc.unicamp.br/eventos/index.php/phyproceedings/article/view/physicae.proceedings.XEJP.2.