| article html file updated | 8 February 2020 19:27 CET | Update | https://www.mdpi.com/2079-9276/6/4/62 |
| article html file updated | 28 September 2019 00:18 CEST | Update | - |
| article html file updated | 2 May 2019 18:59 CEST | Update | - |
| article html file updated | 2 January 2018 10:27 CET | Update | - |
| article html file updated | 25 October 2017 15:54 CEST | Original file | - |
| article xml uploaded. | 25 October 2017 15:52 CEST | Original file | https://www.mdpi.com/2079-9276/6/4/62/xml |
| article pdf uploaded. | 25 October 2017 15:52 CEST | Version of Record | https://www.mdpi.com/2079-9276/6/4/62/pdf |
