1. R. C. Bose, J. W. Freeman andD. G. Glynn, On the intersection of two Baer subplanes in a finite projective plane. Utilitas Math.17, 65–77 (1980).
2. R. H.Bruck, Construction Problems of Finite Projective Planes. Proceedings of the conference in combinatorics held at the University of North Carolina at Chapel Hill, April 10–14, 1967, University of North Carolina Press, 1969.
3. A. A. Bruen, Spreads and a conjecture of Bruck and Bose. J. Algebra3, 519–537 (1972).
4. J. Cofman, Baer subplanes in finite projective and affine planes. Canad. J. Math.24, 90–97 (1972).
5. Klaus Vedder, A note on the intersection of two Baer subplanes. Arch. Math.37, 287–288 (1981).