| article html file updated | 7 February 2020 22:04 CET | Update | https://www.mdpi.com/2220-9964/6/1/30 |
| article html file updated | 23 September 2019 00:39 CEST | Update | - |
| article html file updated | 4 May 2019 13:55 CEST | Update | - |
| article html file updated | 8 February 2017 09:10 CET | Update | - |
| article html file updated | 23 January 2017 10:30 CET | Original file | - |
| article xml uploaded. | 23 January 2017 10:28 CET | Update | https://www.mdpi.com/2220-9964/6/1/30/xml |
| article xml uploaded. | 23 January 2017 10:28 CET | Original file | - |
| article pdf uploaded. | 23 January 2017 10:28 CET | Version of Record | https://www.mdpi.com/2220-9964/6/1/30/pdf |
