I have some experience in this area, but it is not clear to me exactly what you are asking for, nor what you are trying to achieve. Are you running calculations to determine the most stable structure for an oxide, or are you investigating the properties of an already chosen oxide?

I could try to help if you can clarify what you need help with. Are you asking for help analysing results, or rather asking how to perform calculations? 

Thanks Mr Christopher for your response,

At present, I have done relaxation of different stoichiometric ratio of MxOy with different structure for each ratio to get the stable structure. Now with this stable one, next step of calculation is what I did not have idea of, I need more knowledge on this aspect and significant of my calculation to the topic stated above. If any publication to read about it, I wish to have it. This is to model my work for publication standard.

Thank you once again in anticipation

Nobody can tell you what you want to study or why. If you know what question you want to answer, maybe someone can help guide you to the right strategy or technique.