| article html file updated | 6 February 2020 07:49 CET | Update | https://www.mdpi.com/2076-328X/4/1/72 |
| article html file updated | 20 September 2019 06:27 CEST | Update | N/A |
| article html file updated | 7 May 2019 17:31 CEST | Update | N/A |
| article html file updated | 21 March 2019 13:39 CET | Update | N/A |
| article html file updated | 19 August 2015 23:13 CEST | Update | N/A |
| article html file updated | 26 August 2014 03:57 CEST | Original file | N/A |
| article xml file uploaded | 26 August 2014 03:57 CEST | Original file | https://www.mdpi.com/2076-328X/4/1/72/xml |
| article pdf uploaded. | 10 March 2014 11:25 CET | Version of Record | https://www.mdpi.com/2076-328X/4/1/72/pdf |
