| article html file updated | 9 February 2020 16:22 CET | Update | https://www.mdpi.com/2227-7382/6/2/21 |
| article html file updated | 3 October 2019 06:10 CEST | Update | - |
| article html file updated | 30 April 2019 22:28 CEST | Update | - |
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| article html file updated | 27 June 2018 13:03 CEST | Update | - |
| article html file updated | 4 May 2018 12:09 CEST | Original file | - |
| article pdf uploaded. | 4 May 2018 12:07 CEST | Version of Record | https://www.mdpi.com/2227-7382/6/2/21/pdf |
| article xml uploaded. | 4 May 2018 12:07 CEST | Update | https://www.mdpi.com/2227-7382/6/2/21/xml |
| article xml file uploaded | 4 May 2018 12:07 CEST | Original file | - |
