| article html file updated | 7 February 2020 22:52 CET | Update | https://www.mdpi.com/1660-3397/15/2/30 |
| article html file updated | 23 September 2019 05:05 CEST | Update | - |
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| article html file updated | 2 March 2017 09:37 CET | Update | - |
| article html file updated | 8 February 2017 13:16 CET | Original file | - |
| article xml uploaded. | 8 February 2017 13:15 CET | Original file | https://www.mdpi.com/1660-3397/15/2/30/xml |
| article pdf uploaded. | 8 February 2017 13:15 CET | Version of Record | https://www.mdpi.com/1660-3397/15/2/30/pdf |
