| article html file updated | 8 February 2020 17:22 CET | Update | https://www.mdpi.com/2079-9276/6/4/53 |
| article html file updated | 27 September 2019 10:22 CEST | Update | N/A |
| article html file updated | 2 May 2019 23:39 CEST | Update | N/A |
| article html file updated | 2 January 2018 10:30 CET | Update | N/A |
| article html file updated | 28 September 2017 15:33 CEST | Original file | N/A |
| article xml uploaded. | 28 September 2017 15:32 CEST | Original file | https://www.mdpi.com/2079-9276/6/4/53/xml |
| article pdf uploaded. | 28 September 2017 15:32 CEST | Version of Record | https://www.mdpi.com/2079-9276/6/4/53/pdf |
