| article html file updated | 9 February 2020 01:49 CET | Update | https://www.mdpi.com/2075-4442/6/1/2 |
| article html file updated | 29 September 2019 15:15 CEST | Update | N/A |
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| article pdf uploaded. | 23 January 2018 05:52 CET | Updated version of record | https://www.mdpi.com/2075-4442/6/1/2/pdf |
| article html file updated | 2 January 2018 20:58 CET | Original file | N/A |
| article xml uploaded. | 2 January 2018 14:25 CET | Original file | https://www.mdpi.com/2075-4442/6/1/2/xml |
