| article html file updated | 9 February 2020 05:00 CET | Update | https://www.mdpi.com/2079-9268/8/1/4 |
| article html file updated | 1 May 2019 22:09 CEST | Update | N/A |
| article html file updated | 17 April 2019 20:54 CEST | Update | N/A |
| article html file updated | 28 March 2019 19:46 CET | Update | N/A |
| article html file updated | 31 January 2018 10:35 CET | Original file | N/A |
| article xml uploaded. | 31 January 2018 10:34 CET | Original file | https://www.mdpi.com/2079-9268/8/1/4/xml |
| article pdf uploaded. | 31 January 2018 10:34 CET | Version of Record | https://www.mdpi.com/2079-9268/8/1/4/pdf |
