1. Time-frequency and wavelet analysis [special issue];Akay;IEEE Eng Med and Biol,1995
2. Andersson A, Bogduk N, De Luca CJ, Goldenberg D, Mayer T, Roy S, Smidt G. Muscle: clinical perspectives. In: Frymoyer JW, Gordon SL, editors. New perspectives on low back pain. American Academy of Orthopaedic Surgeons, 1988:293–334.
3. Balestra G, Knaflitz M, Merletti R. Stationarity of voluntary and electrically elicited surface myoelectric signals. In: Wallinga W, Boom HBK, de Vries J, editors. Electrophysiological kinesiology. Amsterdam: Elsevier Science Publishers B.V., 1988:275–78.
4. Balestra G, Knaflitz M, De Luca CJ. EMGGEN: a software package for myoelectric signal simulation designed for research and computer aided instruction. In: Anderson PA, Hobart DJ, Danoff JV, editors. Electrophysiological kinesiology. Amsterdam: Elsevier Science, 1991:87–90.
5. Power spectrum analyses of electromyographic activity: discriminators in the differential assessment of patients with chronic low back pain;Biedermann;Spine,1991