00273nam a2200109Ia 4500008004100000100003400041245003100075260002400106260000900130300000800139650001600147221231s9999    xx            000 0 und d  aArumugan S and Ramachandran S 0aInvitation of Graph Theory  bScitech Publicaions  c2003  a137  aMathematics