1.
- Cervical spine research society edition : 19th annual meeting, Philadelphia, Pennsylvania, Dec. 4-6, 1991 / edit. Harry N. Herkowitz. 1992. Vol. 17, No. 10, no. 10S, Suppl. - Philadelphia : Lippincott, 1992 - s. 338-460(Spine; no. 10S, Suppl.) [1, currently available 0, at library only 1]
- Chapters, articles