Baker, Sidney MacDonald
Detoxification and Healing: the key to optimal health
Contemporary Books, 2003
 Buku Teks SO
Jensen, Bernard
Dr. Jensen's guide to diet and detoxification
Keats Pub., 2000
 Buku Teks SO
Champion, R.A.
Learning and activation
John Wiley & Sons, 1969
 Buku Teks SO
Methods for Calculating activation energy for Portland cement.
 Artikel Jurnal
Juhasz, A.Z.
Mechanical activation of minerals by grinding : pulverizing and morphology of particles
Ellis Horwood, 1990
 Buku Teks SO