| article html file updated | 8 February 2020 18:37 CET | Update | https://www.mdpi.com/2227-7390/5/4/51 |
| article html file updated | 2 May 2019 20:54 CEST | Update | N/A |
| article html file updated | 2 January 2018 11:33 CET | Update | N/A |
| article html file updated | 18 October 2017 09:12 CEST | Original file | N/A |
| article xml uploaded. | 18 October 2017 09:11 CEST | Original file | https://www.mdpi.com/2227-7390/5/4/51/xml |
| article pdf uploaded. | 18 October 2017 09:11 CEST | Updated version of record | https://www.mdpi.com/2227-7390/5/4/51/pdf |
| article pdf uploaded. | 16 October 2017 14:27 CEST | Version of Record | https://www.mdpi.com/2227-7390/5/4/51/pdf-vor |
