| article html file updated | 7 February 2020 23:43 CET | Update | https://www.mdpi.com/2220-9964/6/2/52 |
| article html file updated | 23 September 2019 09:43 CEST | Update | N/A |
| article html file updated | 4 May 2019 10:38 CEST | Update | N/A |
| article html file updated | 1 March 2017 03:53 CET | Update | N/A |
| article html file updated | 20 February 2017 09:23 CET | Update | N/A |
| article xml uploaded. | 20 February 2017 09:22 CET | Update | https://www.mdpi.com/2220-9964/6/2/52/xml |
| article xml uploaded. | 20 February 2017 09:22 CET | Update | N/A |
| article pdf uploaded. | 20 February 2017 09:22 CET | Updated version of record | https://www.mdpi.com/2220-9964/6/2/52/pdf |
| article html file updated | 18 February 2017 07:28 CET | Original file | N/A |
| article xml uploaded. | 18 February 2017 07:26 CET | Update | N/A |
| article xml uploaded. | 18 February 2017 07:26 CET | Original file | N/A |
| article pdf uploaded. | 18 February 2017 07:26 CET | Version of Record | https://www.mdpi.com/2220-9964/6/2/52/pdf-vor |
