Complex sentence: This is why Planck units or any other use of natural units should be employed with care; referring to, Paul S. Wesson wrote that, Mathematically it is an acceptable trick which saves labour.
Split into simpler sentences: This is why Planck units or any other use of natural units should be employed with care. Referring to, Paul S. Wesson wrote that, Mathematically it is an acceptable trick which saves labour.