found: Bibliography of semiseparable matrices via WWW, Aug. 2, 2007("Currently there is a growing interest in semiseparable matrices and generalized semiseparable matrices. [...] It is interesting to see that semiseparable matrices were investigated in different fields, e.g. integral equations, statistics, vibrational analysis, independently of each other. Also interesting to know is that the leading statisticians at that time used semiseparable matrices, without knowing their inverses to be tridiagonal. During this historical evolution the definition of semiseparable matrices has always been a difficult point leading to misunderstandings, as they were sometimes defined as the inverse of irreducible tridiagonal matrices leading to generator representable matrices, while in other cases they were defined as matrices having low rank block below the diagonal.")
