1 J. D. Jackson, Classical Electrodynamics (Addison Wesley and Sons, New York, 1998), 3rd ed.
2 F. W. Warburton, “The magnetic pole, A useless concept,” Am. Phys. Teacher 2, 1 (1934).
3 H. S. C. Chen, “Note on the magnetic pole,” Am. J. Phys. 33, 563 (1965).
4 G. Nadeau: “Comment on Chen's note on the magnetic pole,” Am. J. Phys. 34, 60 (1966).
5 J. Goldemberg, “An experimental verification of the Coulomb law for magnetic poles,” Am. J. Phys. 20, 591-592 (1952).
6 In practice, a solenoid is made as a helix of a conducting wire not as a stack of closed wire loops. The difference in current distribution, which can be represented as an additional current along the solenoid, can be made arbitrarily small by reducing the wire current and increasing the number of winding correspondingly.
7 The relation A ∼D B means A and B are dimensionally equivalent and is normally written as [A] = [B].