How to distribute fathers property if there is no will

 My father bought property from his sister. Father sister got the property from DDA. She gave Power of Attorney to our Father. My father did not took any initiative to register property on his name. He is no more now. We are 4 brothers and sister (2 brothers, 1 sister and myself). My mother and 2 brothers are staying in the same property. Now we want to do proceeding to make papers of the property on mother's name or which ever is the law state. Please advice. (We have all the reciepts and documents regarding power of attorney )