| article html file updated | 8 February 2020 00:40 CET | Update | https://www.mdpi.com/2220-9964/6/3/71 |
| article html file updated | 23 September 2019 15:14 CEST | Update | - |
| article html file updated | 4 May 2019 08:29 CEST | Update | - |
| article html file updated | 28 March 2017 11:06 CEST | Update | - |
| article html file updated | 3 March 2017 10:15 CET | Original file | - |
| article xml uploaded. | 3 March 2017 10:14 CET | Original file | https://www.mdpi.com/2220-9964/6/3/71/xml |
| article pdf uploaded. | 3 March 2017 10:14 CET | Version of Record | https://www.mdpi.com/2220-9964/6/3/71/pdf |
