| article html file updated | 7 February 2020 23:07 CET | Update | https://www.mdpi.com/2071-1050/9/2/254 |
| article html file updated | 23 September 2019 06:30 CEST | Update | N/A |
| article html file updated | 4 May 2019 11:47 CEST | Update | N/A |
| article html file updated | 1 March 2017 10:35 CET | Update | N/A |
| article html file updated | 16 February 2017 10:04 CET | Original file | N/A |
| article xml uploaded. | 16 February 2017 10:03 CET | Original file | https://www.mdpi.com/2071-1050/9/2/254/xml |
| article pdf uploaded. | 16 February 2017 10:03 CET | Updated version of record | https://www.mdpi.com/2071-1050/9/2/254/pdf |
| article pdf uploaded. | 10 February 2017 15:54 CET | Version of Record | https://www.mdpi.com/2071-1050/9/2/254/pdf-vor |
