| article html file updated | 7 February 2020 05:53 CET | Update | https://www.mdpi.com/2076-0817/5/1/30 |
| article html file updated | 5 May 2019 21:29 CEST | Update | - |
| article html file updated | 26 March 2019 23:26 CET | Update | - |
| article html file updated | 29 March 2016 07:18 CEST | Original file | - |
| article xml uploaded. | 15 March 2016 09:59 CET | Original file | https://www.mdpi.com/2076-0817/5/1/30/xml |
| article pdf uploaded. | 15 March 2016 09:59 CET | Version of Record | https://www.mdpi.com/2076-0817/5/1/30/pdf |
