Admissions of cross in one court can be used in diff court

Yes you can use them.

Hi you use them in maintiance and divorse case if they relevant you matter and fact on it 

thanks 

Is there any reference that i could use secion or judgements?

Yes u can use it.

Though u dont need to mention any section....but for your reference if asked u can Mention Indian Evidence Act ( IEA )Section 145

Read section 145 of IEA 

Also take certified copies of those statements in 498a case and submit in maintenance case

All the best.