| article html file updated | 8 February 2020 19:19 CET | Update | https://www.mdpi.com/2079-9276/6/4/60 |
| article html file updated | 27 September 2019 23:27 CEST | Update | N/A |
| article html file updated | 2 May 2019 19:19 CEST | Update | N/A |
| article html file updated | 2 January 2018 10:27 CET | Update | N/A |
| article html file updated | 24 October 2017 14:40 CEST | Original file | N/A |
| article xml uploaded. | 24 October 2017 14:39 CEST | Original file | https://www.mdpi.com/2079-9276/6/4/60/xml |
| article pdf uploaded. | 24 October 2017 14:39 CEST | Version of Record | https://www.mdpi.com/2079-9276/6/4/60/pdf |
