Please note: Due to a scheduled maintenance, BOLD Systems will be offline from Friday Apr 26, 2024 4pm EDT to Sunday Apr 28, 2024 7pm EDT. We apologize for the inconvenience.
You've been logged out. Click here to log back in.
full article at Wikipedia
![( - IB2183) @15 [ ] CreativeCommons - Attribution Non-Commercial (2015) Marko Mutanen University of Oulu](http://v3.boldsystems.org/pics/_w300/LEFIJ/IB2183%2B1437137982.jpg "( - IB2183) {} [ ] CreativeCommons - Attribution Non-Commercial (2015)")
![( - MM16518) @14 [ ] No Rights Reserved (2011) Marko Mutanen University of Oulu](http://v3.boldsystems.org/pics/_w300/COEUA/MM16518%2B1316110136.JPG "( - MM16518) {} [ ] No Rights Reserved (2011)")
![( - MM16520) @14 [ ] No Rights Reserved (2011) Marko Mutanen University of Oulu](http://v3.boldsystems.org/pics/_w300/COEUA/MM16520%2B1316110136.JPG "( - MM16520) {} [ ] No Rights Reserved (2011)")
![( - MM16521) @14 [ ] No Rights Reserved (2011) Marko Mutanen University of Oulu](http://v3.boldsystems.org/pics/_w300/COEUA/MM16521%2B1316110134.JPG "( - MM16521) {} [ ] No Rights Reserved (2011)")
![( - IB134) @14 [ ] CreativeCommons - Attribution Non-Commercial (2014) Marko Mutanen University of Oulu](http://v3.boldsystems.org/pics/_w300/LEFIJ/IB134%2B1391107974.JPG "( - IB134) {} [ ] CreativeCommons - Attribution Non-Commercial (2014)")
![( - IB2164) @14 [ ] CreativeCommons - Attribution Non-Commercial (2015) Marko Mutanen University of Oulu](http://v3.boldsystems.org/pics/_w300/LEFIJ/IB2164%2B1437137800.jpg "( - IB2164) {} [ ] CreativeCommons - Attribution Non-Commercial (2015)")
![( - MM16516) @12 [ ] No Rights Reserved (2011) Marko Mutanen University of Oulu](http://v3.boldsystems.org/pics/_w300/COEUA/MM16516%2B1316110136.JPG "( - MM16516) {} [ ] No Rights Reserved (2011)")
