| article html file updated | 8 February 2020 01:00 CET | Update | https://www.mdpi.com/2306-5354/4/1/21 |
| article html file updated | 23 September 2019 17:17 CEST | Update | N/A |
| article html file updated | 4 May 2019 07:42 CEST | Update | N/A |
| article html file updated | 29 March 2017 06:10 CEST | Update | N/A |
| article html file updated | 8 March 2017 10:06 CET | Original file | N/A |
| article xml uploaded. | 8 March 2017 10:05 CET | Original file | https://www.mdpi.com/2306-5354/4/1/21/xml |
| article pdf uploaded. | 8 March 2017 10:05 CET | Version of Record | https://www.mdpi.com/2306-5354/4/1/21/pdf |
