Two disparate Nabokov sightings:
 
1. Temporal Paradoxes in Narrative  www.engl.niu.edu/ojs/index.../12 - Estados Unidos -  Visualização rápida

As Nabokov (252)once observed, "[n]obody can imagine in physical terms the act of reversing the order of time. Time is not reversible."*  Yet several authors have attempted to construct worlds that invalidate this claim. The most notorious are Philip K. Dick in Counter-Clock World (1967)...and Martin Amis in Time's Arrow (1991). Reversed time narratives should not be confused with narrative that tell stories in reverse chronological order, as does the famous film Memento (2000) by Christopher Nolan, or the play and movie Betrayal (1983) by Harold Pinter.  As narratologists know full welll...
Mary-Laure Ryan,University of Colorado, Bolder - 2009
 
2. Rampa de Lançamentc F - 229 [UE] webbif.ifi.unicamp.br/apostilas/f229/exp6/experiencia6.pdf  - Ver em HTML
A translated school-text (originally: "Fundamentals of Physics" by David Halliday, Robert Resnick & John Merrill, 1993) Ch12 - related to wheels, rotation, kinetic energy... "Novelist Nabokov wrote well: 'The miraculous paradox of smooth round objects conquered space by rolling...furnishing mankind with a healthy impact' [O novelista Vladimir Nabokov escreveu bem: “O paradoxo miraculoso de objetos redondos e lisos conquistou espaço simplesmente rolando . . . fomeceu para a Humanidade um impacto saudável."] **

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*V.Nabokov (1975) 
Look at the Harlequins.
** - I couldn't find any indications to locate this quote. 
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