http://dcherukhin.i2p/research/research.htm?i2paddresshelper=XeeEcrjZBSZvLCLt32HWWojBguqcQNIfCcYnLhCSpV3LHMHvq-3nkdVw3DGoJYEQnLEpbhLEH~KwUXs42auWcbRedx895ciACwHpMBnchqCYvYeqKNOnMnlZkpSGJNNSRXAcUM48WLh7v6PscDCDKQFN8KVo9n6OBm0KKQjmaQjIN3unappXVvN90d0Q6tWjftn1mTtm2Is4sYYM3glXr47IXPjTha~XW6Ex5wNqtD7pR5rNN5g5Xcpww2teT~mo52Z1xFE5g7ZgK3rHRVnShmolLNwU2VT1ZGqI5X74Tq6DPu6itln3SYyF6db-X
In the same paper a necessary condition of premaximality for an arbitrary basis is
given, and also all possible candidates for premaximal bases are listed.
Stetsenko conjectured that his necessary condition is also sufficient, that is,
all the bases that he described are premaximal.