Related to Land

When my father purchased that land, he distributed among 3 sons. Land was shared with 3 sons. We were kid that time. When we grew, two of the sons started troubling us. Hence my father took the control n got power of attorney from 2 sons. 1 son denied. After few months my father passed away. Now that power of attorney from 2 son dosen' t have value. Now we need to start from the beginning. 2 sons are denying power of attorney, I have given to my mom name. Is there way, where mom can take the control over land? initially land was purchased by my father n father shared among 3 sons.