| article html file updated | 9 February 2020 12:15 CET | Update | https://www.mdpi.com/2220-9964/7/4/139 |
| article html file updated | 2 October 2019 05:17 CEST | Update | N/A |
| article html file updated | 1 May 2019 06:39 CEST | Update | N/A |
| article html file updated | 17 April 2019 06:42 CEST | Update | N/A |
| article html file updated | 29 March 2019 12:05 CET | Update | N/A |
| article html file updated | 1 May 2018 03:57 CEST | Update | N/A |
| article html file updated | 3 April 2018 13:19 CEST | Update | N/A |
| article html file updated | 2 April 2018 23:49 CEST | Original file | N/A |
| article xml uploaded. | 2 April 2018 15:08 CEST | Original file | https://www.mdpi.com/2220-9964/7/4/139/xml |
| article pdf uploaded. | 2 April 2018 15:08 CEST | Version of Record | https://www.mdpi.com/2220-9964/7/4/139/pdf |
