| article html file updated | 9 February 2020 18:09 CET | Update | https://www.mdpi.com/2218-6581/7/2/21 |
| article html file updated | 3 October 2019 17:42 CEST | Update | N/A |
| article html file updated | 30 April 2019 18:40 CEST | Update | N/A |
| article html file updated | 16 April 2019 19:06 CEST | Update | N/A |
| article html file updated | 30 March 2019 02:13 CET | Update | N/A |
| article html file updated | 26 June 2018 04:53 CEST | Update | N/A |
| article html file updated | 18 May 2018 11:24 CEST | Original file | N/A |
| article pdf uploaded. | 18 May 2018 11:23 CEST | Version of Record | https://www.mdpi.com/2218-6581/7/2/21/pdf |
| article xml uploaded. | 18 May 2018 11:23 CEST | Update | https://www.mdpi.com/2218-6581/7/2/21/xml |
| article xml file uploaded | 18 May 2018 11:23 CEST | Original file | N/A |
