Tài liệu tham khảo WikiPedia: Hiện_tượng_thiên_thể_Nürnberg_1561 http://opac.nebis.ch/F?local_base=NEBIS&CON_LNG=EN... http://ancientaliensdebunked.com/nuremburg-ufo-bat... http://www.jasoncolavito.com/1/post/2012/12/the-uf... http://www.zeno.org/Kunstwerke/A/Glaser,+Hans https://web.archive.org/web/20121214172708/http://... https://web.archive.org/web/20190326115826/https:/...
