[[!redirects Watts_2]] ###Reference Details### +-- cite key : Watts_2 title : The Orbit Space and Basic Forms of a Proper Lie Groupoid author : Watts, J. eprint : <http://arxiv.org/abs/1309.3001v2> mrclass : math.DG note : arXiv:1309.3001v2; Added some notes and clarified some assumptions. 15 pages url : <http://arxiv.org/abs/1309.3001v2> arxiv : [1309.3001](http://www.arxiv.org/abs/1309.3001) refbase : [2122](http://www.math.ntnu.no/~stacey/RefBase/show.php?record=2122) =-- {: .bibliography} --- category: differential topology category: smootheology