| article html file updated | 9 February 2020 10:09 CET | Update | https://www.mdpi.com/2227-9709/5/1/15 |
| article html file updated | 1 October 2019 17:01 CEST | Update | - |
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| article html file updated | 27 March 2018 15:32 CEST | Update | - |
| article html file updated | 16 March 2018 18:20 CET | Original file | - |
| article xml uploaded. | 16 March 2018 18:19 CET | Update | https://www.mdpi.com/2227-9709/5/1/15/xml |
| article pdf uploaded. | 16 March 2018 18:19 CET | Version of Record | https://www.mdpi.com/2227-9709/5/1/15/pdf |
