| article html file updated | 7 February 2020 09:04 CET | Update | https://www.mdpi.com/2075-4450/7/2/21 |
| article html file updated | 5 May 2019 15:06 CEST | Update | N/A |
| article html file updated | 27 March 2019 05:22 CET | Update | N/A |
| article html file updated | 4 July 2016 10:36 CEST | Update | N/A |
| article html file updated | 21 May 2016 04:57 CEST | Original file | N/A |
| article xml uploaded. | 21 May 2016 04:56 CEST | Original file | https://www.mdpi.com/2075-4450/7/2/21/xml |
| article pdf uploaded. | 21 May 2016 04:56 CEST | Version of Record | https://www.mdpi.com/2075-4450/7/2/21/pdf |
