| article html file updated | 7 February 2020 22:47 CET | Update | https://www.mdpi.com/2073-4344/7/2/50 |
| article html file updated | 23 September 2019 04:36 CEST | Update | - |
| article html file updated | 4 May 2019 12:28 CEST | Update | - |
| article html file updated | 1 March 2017 07:50 CET | Update | - |
| article html file updated | 7 February 2017 11:31 CET | Original file | - |
| article xml uploaded. | 7 February 2017 11:29 CET | Original file | https://www.mdpi.com/2073-4344/7/2/50/xml |
| article pdf uploaded. | 7 February 2017 11:29 CET | Version of Record | https://www.mdpi.com/2073-4344/7/2/50/pdf |
