Ignore hyphens when sorting

I have a list and am sorting by a reference number.

The reference numbers have two formats, AB-C-01 and ABC02. Some have hyphens and some don't. With or without hypens, each reference is unique.

When I sort my list has all the hyphenated references first, then the unhyphenated. So they're not in order - or not the order I want.

AB-C-01

XY-Z-01

ABD01

I want ABD01 to be the second item in that list, not the third.

I can't remove the hyphens, they are my definitive reference number. How could I sort to result in 

AB-C-01

ADB01

XY-Z-01

Thanks for any pointers!