| article html file updated | 7 February 2020 23:42 CET | Update | https://www.mdpi.com/2220-9964/6/2/48 |
| 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 03:50 CET | Update | N/A |
| article html file updated | 18 February 2017 07:22 CET | Original file | N/A |
| article xml uploaded. | 18 February 2017 07:21 CET | Update | https://www.mdpi.com/2220-9964/6/2/48/xml |
| article xml uploaded. | 18 February 2017 07:21 CET | Original file | N/A |
| article pdf uploaded. | 18 February 2017 07:21 CET | Version of Record | https://www.mdpi.com/2220-9964/6/2/48/pdf |
