| article html file updated | 8 February 2020 15:38 CET | Update | https://www.mdpi.com/2227-9709/4/3/30 |
| article html file updated | 27 September 2019 00:32 CEST | Update | N/A |
| article html file updated | 3 May 2019 02:59 CEST | Update | N/A |
| article html file updated | 27 October 2017 10:28 CEST | Update | N/A |
| article html file updated | 8 September 2017 10:54 CEST | Original file | N/A |
| article xml uploaded. | 8 September 2017 10:53 CEST | Original file | https://www.mdpi.com/2227-9709/4/3/30/xml |
| article pdf uploaded. | 8 September 2017 10:53 CEST | Version of Record | https://www.mdpi.com/2227-9709/4/3/30/pdf |
