| article html file updated | 8 February 2020 02:57 CET | Update | https://www.mdpi.com/2227-7390/5/2/23 |
| article html file updated | 24 September 2019 04:16 CEST | Update | - |
| article html file updated | 4 May 2019 03:29 CEST | Update | - |
| article html file updated | 29 June 2017 11:35 CEST | Update | - |
| article html file updated | 10 April 2017 10:10 CEST | Original file | - |
| article xml uploaded. | 10 April 2017 10:09 CEST | Original file | https://www.mdpi.com/2227-7390/5/2/23/xml |
| article pdf uploaded. | 10 April 2017 10:09 CEST | Updated version of record | https://www.mdpi.com/2227-7390/5/2/23/pdf |
| article pdf uploaded. | 5 April 2017 12:18 CEST | Version of Record | https://www.mdpi.com/2227-7390/5/2/23/pdf-vor |
