The Gömböc Pill
https://link.springer.com/article/10.1007/s00283-019-09891-x

Explaining the Elongated Shape of 'Oumuamua by the Eikonal Abrasion Model
https://iopscience.iop.org/article/10.3847/2515-5172/aaa12f/meta

Reconstructing the transport history of pebbles on Mars
https://www.nature.com/articles/ncomms9366

Pebbles on Mars likely traveled tens of miles down a riverbed, study finds
http://phys.org/news/2015-10-pebbles-mars-tens-miles-riverbed.html

Numerator: Die Mathematik der Schildkröten-Rolle
http://www.spiegel.de/wissenschaft/mensch/numerator-die-mathematik-der-s...

Geometrie hilft Schildkröten auf die Beine
http://www.scienceticker.info/2007/10/17/geometrie-hilft-schildkroeten-a...

How tortoises turn right-side up
http://www.nature.com/news/2007/071016/full/news.2007.170.html

Can't Knock It Down
https://www.sciencenews.org/article/cant-knock-it-down

Some turtles win the old shell game
http://www.thestar.com/news/2007/10/24/some_turtles_win_the_old_shell_ga...

Wie sich Schildkröten umdrehen
http://www.tagesspiegel.de/wissen/zoologie-wie-sich-schildkroeten-umdreh...

Natürliche Stehaufmännchen
http://www.schlaulesen.de/index.php?wo=text&was=25

Wikipedia – The Gömböc
https://fr.wikipedia.org/wiki/G%C3%B6mb%C3%B6c

Wired
http://wired.jp/2008/03/04/%E5%8B%95%E7%94%BB%EF%BC%9A%E7%90%86%E8%AB%96...

Kaip vėžliai persiverčia ant pilvo?
http://www.delfi.lt/mokslas/mokslas/kaip-vezliai-persivercia-ant-pilvo.d...

MATEMATİK SİTESİ
https://fatihsultan.wordpress.com/2007/04/22/vur-beline-kazmayi-2/

Nature News:
http://www.nature.com/news/2007/071016/full/news.2007.170.html