| article html file updated | 9 February 2020 18:08 CET | Update | https://www.mdpi.com/2218-6581/7/2/20 |
| article html file updated | 3 October 2019 17:40 CEST | Update | - |
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| article html file updated | 26 June 2018 04:52 CEST | Update | - |
| article html file updated | 18 May 2018 11:10 CEST | Original file | - |
| article pdf uploaded. | 18 May 2018 11:09 CEST | Version of Record | https://www.mdpi.com/2218-6581/7/2/20/pdf |
| article xml uploaded. | 18 May 2018 11:09 CEST | Update | https://www.mdpi.com/2218-6581/7/2/20/xml |
| article xml file uploaded | 18 May 2018 11:09 CEST | Original file | - |
