| article html file updated | 9 February 2020 07:38 CET | Update | https://www.mdpi.com/2227-7099/6/1/13 |
| article html file updated | 1 May 2019 16:19 CEST | Update | N/A |
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| article xml uploaded. | 26 February 2018 04:23 CET | Original file | https://www.mdpi.com/2227-7099/6/1/13/xml |
| article pdf uploaded. | 26 February 2018 04:23 CET | Version of Record | https://www.mdpi.com/2227-7099/6/1/13/pdf |
