| article html file updated | 7 February 2020 21:12 CET | Update | https://www.mdpi.com/2077-0472/7/1/2 |
| article html file updated | 4 May 2019 15:53 CEST | Update | - |
| article html file updated | 7 February 2017 04:40 CET | Update | - |
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| article html file updated | 11 January 2017 13:02 CET | Update | - |
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| article html file updated | 11 January 2017 13:01 CET | Original file | - |
| article xml uploaded. | 11 January 2017 13:00 CET | Original file | https://www.mdpi.com/2077-0472/7/1/2/xml |
| article pdf uploaded. | 11 January 2017 13:00 CET | Version of Record | https://www.mdpi.com/2077-0472/7/1/2/pdf |
