Ƙirƙiri wani nau'i mai mahimmanci na wannan jumla M.Stroppel 1995'' Compact Projective Planes ', W. de Gruyter 87.7.
Tabbas, mafi mahimmancin jumlar ita ce "M.Stroppel 1995 '' Compact Projective Planes ',' W. de Gruyter Babi na 8 da kuma kwanan nan a cikin H. Salzmann 2014''Compact planes, mafi yawa 8-dimensional. "