| article html file updated | 8 February 2020 02:16 CET | Update | https://www.mdpi.com/2077-1312/5/2/15 |
| article html file updated | 24 September 2019 00:20 CEST | Update | N/A |
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| article html file updated | 25 March 2017 11:27 CET | Original file | N/A |
| article xml uploaded. | 25 March 2017 11:25 CET | Update | https://www.mdpi.com/2077-1312/5/2/15/xml |
| article pdf uploaded. | 25 March 2017 11:25 CET | Version of Record | https://www.mdpi.com/2077-1312/5/2/15/pdf |