1. Backlund, E. O., A new instrument for stereotaxic brain tumour biopsy. Acta Chir. Scand.137 (1971), 825–827.
2. Backlund, E. O., Johansson, L., Sarby, B., Studies on cranio-pharyngiomas. II. Treatment by stereotaxis and radiosurgery. Acta Chir. Scand.138 (1972), 749–759.
3. Bergström, M., Boëthius, J., Collins, V. P., Edner, G., Lewander, R., Willems, J., A combined study with computed tomography and stereotactic biopsy in gliomas. Proceedings of the VI International Congress of Neurological Surgery, Sao Paulo, Brazil 1977, pp. 45–50. Amsterdam-Oxford: Excerpta Medica. 1978.
4. Boëthius, J., Bergström, M., Greitz, T., Stereotaxic computerized tomography with a GE 8800 scanner. J. Neurosurg.52 (1980), 794–800.
5. Boëthius, J., Collins, V. P., Edner, G., Lewander, R., Zajicek, J., Correlation between histology and computer tomography in gliomas assessed by multiple needle biopsies. Acta neurochir. (Wien)37 (1977), 304.