LONDON, England, Nov. 28 -- Communications in Algebra published research articles on the following topics in its Vol. 52, Issue 12 edition:

* A generalization of an Agrawal theorem on soluble PST-groups

* A new formation with Shemetkov property

* A scheme associated to modules over commutative rings

* An extension formula for right Bol loops arising from Bol reflections

* Applications of generalized universal valuations