| article html file updated | 5 February 2020 16:53 CET | Update | https://www.mdpi.com/1422-8599/2011/1/M721 |
| article html file updated | 9 May 2019 01:34 CEST | Update | N/A |
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| article html file updated | 25 September 2017 04:31 CEST | Update | N/A |
| article xml uploaded. | 25 September 2017 04:30 CEST | Update | https://www.mdpi.com/1422-8599/2011/1/M721/xml |
| article html file updated | 25 September 2017 04:21 CEST | Update | N/A |
| article xml uploaded. | 25 September 2017 04:20 CEST | Original file | N/A |
| article html file updated | 14 December 2016 11:58 CET | Original file | N/A |
