| article html file updated | 7 February 2020 23:29 CET | Update | https://www.mdpi.com/2220-9964/6/2/45 |
| article html file updated | 23 September 2019 08:28 CEST | Update | N/A |
| article html file updated | 4 May 2019 11:04 CEST | Update | N/A |
| article html file updated | 1 March 2017 03:48 CET | Update | N/A |
| article html file updated | 17 February 2017 11:50 CET | Original file | N/A |
| article xml uploaded. | 17 February 2017 11:48 CET | Original file | https://www.mdpi.com/2220-9964/6/2/45/xml |
| article pdf uploaded. | 17 February 2017 11:48 CET | Updated version of record | https://www.mdpi.com/2220-9964/6/2/45/pdf |
| article pdf uploaded. | 15 February 2017 12:27 CET | Version of Record | https://www.mdpi.com/2220-9964/6/2/45/pdf-vor |
