Adarsh, N.N.Krishnakumar, D.Dastidar, Parthasarathi2012-02-152012-02-152007Tetrahedron 63 (2007) 7386–7396http://hdl.handle.net/1968424/808enComposites of N,N0-bis-(pyridyl) urea-dicarboxylic acid as new hydrogelators—a crystal engineering approachArticle