| article html file updated | 8 February 2020 05:54 CET | Update | https://www.mdpi.com/2075-4450/8/2/51 |
| article html file updated | 3 May 2019 21:58 CEST | Update | N/A |
| article html file updated | 30 June 2017 05:40 CEST | Update | N/A |
| article html file updated | 23 May 2017 04:15 CEST | Update | N/A |
| article html file updated | 15 May 2017 17:22 CEST | Original file | N/A |
| article xml uploaded. | 15 May 2017 17:21 CEST | Original file | https://www.mdpi.com/2075-4450/8/2/51/xml |
| article pdf uploaded. | 15 May 2017 17:21 CEST | Version of Record | https://www.mdpi.com/2075-4450/8/2/51/pdf |
