| article html file updated | 7 February 2020 23:36 CET | Update | https://www.mdpi.com/2076-3387/7/1/4 |
| article html file updated | 23 September 2019 09:07 CEST | Update | - |
| article html file updated | 4 May 2019 10:50 CEST | Update | - |
| article html file updated | 27 October 2017 09:18 CEST | Update | - |
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| article xml uploaded. | 17 February 2017 06:52 CET | Original file | https://www.mdpi.com/2076-3387/7/1/4/xml |
| article pdf uploaded. | 17 February 2017 06:52 CET | Version of Record | https://www.mdpi.com/2076-3387/7/1/4/pdf |
