| article html file updated | 8 February 2020 04:50 CET | Update | https://www.mdpi.com/2227-7102/7/2/51 |
| article html file updated | 24 September 2019 14:39 CEST | Update | N/A |
| article html file updated | 3 May 2019 23:55 CEST | Update | N/A |
| article html file updated | 27 October 2017 09:58 CEST | Update | N/A |
| article html file updated | 23 May 2017 03:29 CEST | Update | N/A |
| article html file updated | 4 May 2017 12:21 CEST | Original file | N/A |
| article xml uploaded. | 4 May 2017 12:20 CEST | Original file | https://www.mdpi.com/2227-7102/7/2/51/xml |
| article pdf uploaded. | 4 May 2017 12:20 CEST | Updated version of record | https://www.mdpi.com/2227-7102/7/2/51/pdf |
| article pdf uploaded. | 1 May 2017 09:49 CEST | Version of Record | https://www.mdpi.com/2227-7102/7/2/51/pdf-vor |
