| article html file updated | 7 February 2020 23:54 CET | Update | https://www.mdpi.com/2075-163X/7/2/31 |
| article html file updated | 23 September 2019 10:44 CEST | Update | - |
| article html file updated | 4 May 2019 10:14 CEST | Update | - |
| article html file updated | 1 March 2017 10:25 CET | Update | - |
| article html file updated | 23 February 2017 04:20 CET | Original file | - |
| article xml uploaded. | 23 February 2017 04:19 CET | Original file | https://www.mdpi.com/2075-163X/7/2/31/xml |
| article pdf uploaded. | 23 February 2017 04:19 CET | Updated version of record | https://www.mdpi.com/2075-163X/7/2/31/pdf |
| article pdf uploaded. | 21 February 2017 10:55 CET | Version of Record | https://www.mdpi.com/2075-163X/7/2/31/pdf-vor |
