Can you provide those links or citations, please?
Heres a few:
From the
Diocese of Davenport :
The question of blessing those not receiving communion: In the past number of years, the practice has
developed in certain places that those not receiving communion—whether children too young to receive
communion, those who are not Catholic, or those unable to approach the Sacrament due to canonical
reasons—to join in the communion procession and receive a blessing from the minister. For those
communities which have elected to follow such a practice, the following should be kept in mind:
o Lay ministers should not bless with a gesture or formula reserved to clerics. For example, they should
not make the sign of the cross over someone while using the Trinitarian formula. A simple “May our
loving God bless you” with or without a light touch of the head would be appropriate (CIC c.1168).
From
Fr. J.T. Zuhlsdorf (father_z):
Anything that confuses the roles of lay people and priests (or deacons) should be avoided. While it is true that any person can ask God to bless anyone else, and while it is true that parents should bless their children, lay people cannot bless in the manner of priests. Lay people ought not do anything which resembles blessing in the manner of the priest, such as making the sign of the Cross over people as a priest would do.
A good article from Fr.McNamara can also be found
here