| article html file updated | 7 February 2020 22:24 CET | Update | https://www.mdpi.com/2073-4344/7/2/44 |
| article html file updated | 23 September 2019 02:30 CEST | Update | N/A |
| article html file updated | 4 May 2019 13:14 CEST | Update | N/A |
| article html file updated | 1 March 2017 07:48 CET | Update | N/A |
| article html file updated | 6 February 2017 07:11 CET | Original file | N/A |
| article xml uploaded. | 6 February 2017 07:10 CET | Original file | https://www.mdpi.com/2073-4344/7/2/44/xml |
| article pdf uploaded. | 6 February 2017 07:10 CET | Updated version of record | https://www.mdpi.com/2073-4344/7/2/44/pdf |
| article pdf uploaded. | 28 January 2017 08:02 CET | Version of Record | https://www.mdpi.com/2073-4344/7/2/44/pdf-vor |
