@article{oai:tsukuba.repo.nii.ac.jp:00039362,
 author = {GULER, Erhan and VANLI, Aysel Turght},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {},
 pages = {49--65},
 title = {On The Mean, Gauss, The Second Gaussian and The Second Mean Curvature of The Helicoidal Surfaces with Light-Like Axis in R3},
 volume = {32},
 year = {2008}
}