| article html file updated | 6 February 2020 22:30 CET | Update | https://www.mdpi.com/2076-3921/4/3/591 |
| article html file updated | 21 September 2019 02:59 CEST | Update | N/A |
| article html file updated | 6 May 2019 11:57 CEST | Update | N/A |
| article html file updated | 26 March 2019 10:10 CET | Update | N/A |
| article html file updated | 14 October 2015 08:44 CEST | Original file | N/A |
| article xml file uploaded | 14 October 2015 08:44 CEST | Original file | https://www.mdpi.com/2076-3921/4/3/591/xml |
| article pdf uploaded. | 7 September 2015 14:48 CEST | Version of Record | https://www.mdpi.com/2076-3921/4/3/591/pdf |
