| article html file updated | 8 February 2020 23:45 CET | Update | https://www.mdpi.com/2311-5637/3/4/67 |
| article html file updated | 29 September 2019 03:14 CEST | Update | - |
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| article html file updated | 2 January 2018 17:02 CET | Update | - |
| article html file updated | 11 December 2017 13:57 CET | Original file | - |
| article xml uploaded. | 11 December 2017 13:56 CET | Original file | https://www.mdpi.com/2311-5637/3/4/67/xml |
| article pdf uploaded. | 11 December 2017 13:56 CET | Version of Record | https://www.mdpi.com/2311-5637/3/4/67/pdf |
