| article html file updated | 8 February 2020 07:17 CET | Update | https://www.mdpi.com/2227-7080/5/2/31 |
| article html file updated | 25 September 2019 03:14 CEST | Update | N/A |
| article html file updated | 3 May 2019 19:20 CEST | Update | N/A |
| article html file updated | 29 June 2017 11:57 CEST | Update | N/A |
| article html file updated | 8 June 2017 11:21 CEST | Original file | N/A |
| article xml uploaded. | 8 June 2017 11:20 CEST | Update | https://www.mdpi.com/2227-7080/5/2/31/xml |
| article pdf uploaded. | 8 June 2017 11:20 CEST | Updated version of record | https://www.mdpi.com/2227-7080/5/2/31/pdf |
| article pdf uploaded. | 2 June 2017 11:53 CEST | Version of Record | https://www.mdpi.com/2227-7080/5/2/31/pdf-vor |
