| article html file updated | 7 February 2020 06:24 CET | Update | https://www.mdpi.com/2075-4701/6/4/74 |
| article html file updated | 5 May 2019 20:26 CEST | Update | N/A |
| article html file updated | 27 March 2019 00:19 CET | Update | N/A |
| article html file updated | 28 April 2016 12:06 CEST | Update | N/A |
| article html file updated | 25 March 2016 09:15 CET | Original file | N/A |
| article xml uploaded. | 25 March 2016 09:13 CET | Original file | https://www.mdpi.com/2075-4701/6/4/74/xml |
| article pdf uploaded. | 25 March 2016 09:13 CET | Version of Record | https://www.mdpi.com/2075-4701/6/4/74/pdf |
