| article html file updated | 9 February 2020 04:59 CET | Update | https://www.mdpi.com/2218-1989/8/1/11 |
| article html file updated | 1 May 2019 22:10 CEST | Update | - |
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| article html file updated | 26 March 2018 17:12 CEST | Update | - |
| article html file updated | 31 January 2018 10:10 CET | Original file | - |
| article xml uploaded. | 31 January 2018 10:08 CET | Original file | https://www.mdpi.com/2218-1989/8/1/11/xml |
| article pdf uploaded. | 31 January 2018 10:08 CET | Version of Record | https://www.mdpi.com/2218-1989/8/1/11/pdf |
