Example of Chain of Circles on an Elliptic Quadric of PG(3, q), q=9, 13.

Grazia Raguso Example of Chain of Circles on an Elliptic Quadric of PG(3, q), q=9, 13. 99-101 1982 33 J. Comb. Theory, Ser. A 1 db/journals/jct/jcta33.html#Raguso82