@article{oai:ir.soken.ac.jp:00003315,
 author = {池内, 了 and IKEUCHI, Satoru},
 journal = {Publications of the Astronomical Society of Japan, Publications of the Astronomical Society of Japan},
 month = {},
 note = {application/pdf, The virial mass discrepancy in groups and clusters of galaxies is reexamined from the viewpoint of the mass-loss hypothesis. The relation between the virial mass discrepancy and the density of the system is derived, and the general features of observations are well explained. This relation implies that the system of galaxies is unbound and expands freely.},
 pages = {169--180},
 title = {On the Mass-Loss Hypothesis of Virial Mass Discrepancy in Groups and Clusters of Galaxies},
 volume = {31},
 year = {1979}
}