| article html file updated | 9 February 2020 02:47 CET | Update | https://www.mdpi.com/2076-3921/7/1/9 |
| article html file updated | 2 May 2019 02:47 CEST | Update | N/A |
| article html file updated | 18 April 2019 01:00 CEST | Update | N/A |
| article html file updated | 28 March 2019 14:56 CET | Update | N/A |
| article html file updated | 1 February 2018 13:56 CET | Update | N/A |
| article html file updated | 12 January 2018 06:49 CET | Original file | N/A |
| article xml uploaded. | 12 January 2018 06:48 CET | Update | https://www.mdpi.com/2076-3921/7/1/9/xml |
| article xml uploaded. | 12 January 2018 05:31 CET | Update | N/A |
| article xml uploaded. | 12 January 2018 05:28 CET | Original file | N/A |
| article pdf uploaded. | 12 January 2018 05:28 CET | Version of Record | https://www.mdpi.com/2076-3921/7/1/9/pdf |
