| article html file updated | 8 February 2020 22:01 CET | Update | https://www.mdpi.com/2079-7737/6/4/40 |
| article html file updated | 28 September 2019 16:52 CEST | Update | - |
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| article html file updated | 18 April 2019 10:47 CEST | Update | - |
| article html file updated | 7 September 2018 03:02 CEST | Update | - |
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| article html file updated | 20 December 2017 10:51 CET | Update | - |
| article xml uploaded. | 20 December 2017 10:50 CET | Update | https://www.mdpi.com/2079-7737/6/4/40/xml |
| article xml uploaded. | 20 December 2017 10:50 CET | Update | - |
| article pdf uploaded. | 20 December 2017 10:50 CET | Updated version of record | https://www.mdpi.com/2079-7737/6/4/40/pdf |
| article html file updated | 23 November 2017 14:38 CET | Original file | - |
| article xml uploaded. | 23 November 2017 14:37 CET | Update | - |
| article xml uploaded. | 23 November 2017 14:37 CET | Original file | - |
| article pdf uploaded. | 23 November 2017 14:37 CET | Version of Record | https://www.mdpi.com/2079-7737/6/4/40/pdf-vor |
