| article html file updated | 8 February 2020 02:01 CET | Update | https://www.mdpi.com/2227-7102/7/2/42 |
| article html file updated | 4 May 2019 05:29 CEST | Update | N/A |
| article html file updated | 27 October 2017 09:57 CEST | Update | N/A |
| article html file updated | 27 March 2017 05:25 CEST | Update | N/A |
| article html file updated | 24 March 2017 07:29 CET | Update | N/A |
| article html file updated | 24 March 2017 07:12 CET | Update | N/A |
| article html file updated | 23 March 2017 07:33 CET | Original file | N/A |
| article xml uploaded. | 23 March 2017 07:31 CET | Original file | https://www.mdpi.com/2227-7102/7/2/42/xml |
| article pdf uploaded. | 23 March 2017 07:31 CET | Version of Record | https://www.mdpi.com/2227-7102/7/2/42/pdf |
