Odkazy:
[1] https://membrana.sk/profile/nanyk
[2] https://membrana.sk/cat/volne-verse
[3] http://s000.tinyupload.com/download.php?file_id=20096744323854449868&t=2009674432385444986820340
[4] https://www.scribd.com/doc/264492044/Mathesis-universalis
[5] http://pdfsr.com/pdf/mathesis-universalis-1