1. C. Callender, A. Thresher, Time and the observer. University of California, San Diego, La Jolla, United States, May 3, 2018–May 4, 2018. https://philevents.org/event/show/42046/, http://ccallender7.wixsite.com/mysite/time-the-observer.
2. B. C. van Fraassen, An introduction to the philosophy of time and space. Published by Random House in 1970, Reprinted by Columbia University Press in 1985. For information contact Nousoul Digital Publishers: nousoul.dp@gmail.com. Retrived on 05.08.2018
3. V. Gijsbers, Wageningen, The philosophy of time (2017). https://www.wur.nl/upload_mm/2/c/8/b7268bad-67d9-4e4f-a984-24e798b3d773. Retrived on 05.08.2018
4. https://www.getmeashop.com/blog/importance-of-content-in-e-commerce/
5. J. Seddon, Bioelectronics study with us nano technology. Comments Apr 20, 2018. https://sites.manchester.ac.uk/bioelectronics/?s=bioelectronics