| article html file updated | 7 February 2020 23:05 CET | Update | https://www.mdpi.com/2075-4701/7/2/52 |
| article html file updated | 23 September 2019 06:17 CEST | Update | - |
| article html file updated | 4 May 2019 11:51 CEST | Update | - |
| article html file updated | 1 March 2017 03:53 CET | Update | - |
| article html file updated | 10 February 2017 13:06 CET | Update | - |
| article html file updated | 10 February 2017 13:06 CET | Update | - |
| article html file updated | 10 February 2017 13:06 CET | Original file | - |
| article xml uploaded. | 10 February 2017 13:04 CET | Update | https://www.mdpi.com/2075-4701/7/2/52/xml |
| article xml uploaded. | 10 February 2017 13:04 CET | Original file | - |
| article pdf uploaded. | 10 February 2017 13:04 CET | Version of Record | https://www.mdpi.com/2075-4701/7/2/52/pdf |
