Betweenness plane geometry and its relationship with convex, linear, and projective plane geometries; 233-251
In: Proceedings of the Estonian Academy of Sciences. Physics, mathematics, Band 56, Heft 3, S. 233
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In: Proceedings of the Estonian Academy of Sciences. Physics, mathematics, Band 56, Heft 3, S. 233
In: Proceedings of the Estonian Academy of Sciences. Physics, mathematics, Band 56, Heft 3, S. 252
In: Proceedings of the Estonian Academy of Sciences. Physics, mathematics, Band 55, Heft 3, S. 189
In: Proceedings of the Estonian Academy of Sciences. Physics, mathematics, Band 54, Heft 3, S. 131
In: Proceedings of the Estonian Academy of Sciences. Physics, mathematics, Band 53, Heft 4, S. 203
In: Proceedings of the Estonian Academy of Sciences. Physics, mathematics, Band 51, Heft 2, S. 67
In: Proceedings of the Estonian Academy of Sciences. Physics, mathematics, Band 50, Heft 3, S. 115
In: Proceedings of the Estonian Academy of Sciences. Physics, mathematics, Band 49, Heft 4, S. 203
In: Proceedings of the Estonian Academy of Sciences. Physics, mathematics, Band 45, Heft 2/3, S. 161
In: Proceedings of the Estonian Academy of Sciences. Physics. Mathematics, Band 44, Heft 4, S. 411
In: Proceedings of the Estonian Academy of Sciences. Physics. Mathematics, Band 42, Heft 3, S. 222
In: Proceedings of the Estonian Academy of Sciences. Physics. Mathematics, Band 40, Heft 4, S. 245
In: Proceedings of the Estonian Academy of Sciences. Physics. Mathematics, Band 39, Heft 1, S. 1
In: Proceedings of the Estonian Academy of Sciences. Physics. Mathematics, Band 39, Heft 1, S. 1
In: Proceedings of the Academy of Sciences of the Estonian SSR. Physics. Mathematics, Band 38, Heft 4, S. 453