linking to equations

Robert Belford

What is the best way to link to an equation, where the link has the equation number and it gets changed if someone reuses the page?  I thought we used to use labels, but I want to say, according to eq. 17.1, do this....  And if some reuses it, allow the numbering to realign.  

Dr. Robert E. Belford
UALR Department of Chemistry
501 916-6540

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