Position vector of spacelike biharmonic curves in the Lorentzian Heisenberg group Heis 3 . Turhan, Essin; Körpinar, Talat — 2011 Analele Ştiinţifice ale Universităţii “Ovidius" Constanţa. Seria: Matematică
Biminimal general helix in the Heisenberg group H e i s 3 Essin Turhan; Talat Körpinar — 2010 Kragujevac Journal of Mathematics