eng: Add citation for interpolation methods

Author: jo-mueller

index.md

@@ -975,8 +975,11 @@ Metadata for these coordinate transforms have the following fields:
     Its value indicates the interpolation to use if transforming points not on the array's discrete grid. Well-defined values include:
     - `"nearest"` for nearest neighbor interpolation,
     - `"linear"` for linear interpolation (default)
-    - `"cubic"` for cubic interpolation, etc.
+    - `"bspline-cubic"` for cubic interpolation, etc.
+    
     Consumers SHOULD clearly communicate to users if a different interpolation method is used.
+    See also {cite:t}`thevenaz2000image` for more details on interpolation methods.
+
 
 
 ```{hint}

references.bib

@@ -22,3 +22,14 @@ @software{ngff_spec_latest
   doi          = {10.5281/zenodo.4282106},
   url          = {https://ngff.openmicroscopy.org/latest/},
 }
+
+@article{thevenaz2000image,
+  title={Image interpolation and resampling},
+  author={Th{\'e}venaz, Philippe and Blu, Thierry and Unser, Michael},
+  journal={Handbook of medical imaging, processing and analysis},
+  volume={1},
+  number={1},
+  pages={393--420},
+  year={2000},
+  url={https://bigwww.epfl.ch/publications/thevenaz9901.pdf}
+}