| article html file updated | 7 February 2020 18:41 CET | Update | https://www.mdpi.com/2304-6732/3/4/61 |
| article html file updated | 4 May 2019 21:12 CEST | Update | - |
| article html file updated | 28 December 2016 11:35 CET | Update | - |
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| article html file updated | 2 December 2016 00:25 CET | Update | - |
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| article pdf uploaded. | 1 December 2016 11:09 CET | Updated version of record | https://www.mdpi.com/2304-6732/3/4/61/pdf |
| article html file updated | 26 November 2016 12:31 CET | Original file | - |
| article xml uploaded. | 26 November 2016 12:30 CET | Original file | - |
| article pdf uploaded. | 26 November 2016 12:30 CET | Version of Record | https://www.mdpi.com/2304-6732/3/4/61/pdf-vor |
