| article html file updated | 6 February 2020 23:36 CET | Update | https://www.mdpi.com/2076-3921/4/4/662 |
| article html file updated | 6 May 2019 09:42 CEST | Update | N/A |
| article html file updated | 26 March 2019 12:13 CET | Update | N/A |
| article html file updated | 10 October 2015 06:30 CEST | Original file | N/A |
| article xml file uploaded | 10 October 2015 06:30 CEST | Original file | https://www.mdpi.com/2076-3921/4/4/662/xml |
| article pdf uploaded. | 9 October 2015 17:26 CEST | Version of Record | https://www.mdpi.com/2076-3921/4/4/662/pdf |
