00398nam a2200157 a 450000500170000007200060001708200060002310000240002924501020005326000110015530000100016650000310017670000210020785600060022885600060023420251203115600.0  x_  b_  aKrishnakumar, K.d_  aA study of symmetries, reductions and solutions of certain classes of differential equationsbc_  aPU.c_  bce_  aPh.D Theses Softcopy alone  aTamizhmani, K M.  f_  a_