| article html file updated | 7 February 2020 09:54 CET | Update | https://www.mdpi.com/2075-1729/6/2/23 |
| article html file updated | 5 May 2019 13:27 CEST | Update | N/A |
| article html file updated | 27 March 2019 06:59 CET | Update | N/A |
| article html file updated | 4 July 2016 10:34 CEST | Update | N/A |
| article html file updated | 8 June 2016 09:09 CEST | Original file | N/A |
| article xml uploaded. | 8 June 2016 09:08 CEST | Original file | https://www.mdpi.com/2075-1729/6/2/23/xml |
| article pdf uploaded. | 8 June 2016 09:08 CEST | Version of Record | https://www.mdpi.com/2075-1729/6/2/23/pdf |
