Two which Nelson wrote jointly with Bernhard Banaschewski were On residual finiteness and finite embeddability and Equational compactness in equational classes of algebras both of which were published in Algebra Universalis.
Dalawang na Nelson wrote sama-sama sa Bernhard Banaschewski ay Sa tira-hangganan at wakas embeddability at Equational limit sa equational klase ng algebras pareho ng mga na-publish sa algebra Universalis.