Collaborators:

- Camilo Arias Abad (former PhD student).

- Henrique Bursztyn

- Benoit Dherin

- Rui Loja Fernandes

- Ioan Marcut (PhD student).

- Ieke Moerdijk (my former supervisor).

- Ivan Struchiner .

- David martinez Torres

- Chenchang Zhu

- Csaba Varga.

- Alan Weinstein

- Groupoid Home Page Maintained by Birant Ramazan

- Operator Algebras Home Page and Deformation Quantization Home Page (maintained by Birant Ramazan)

Others:

- Klaas Landsman

- Kirill Mackenzie

- Janez Mrcun

- Victor Nistor