On "insoluble" sentences

Heytesbury, William active 1340. On "insoluble" sentences: chapter one of his "Rules for solving sophisms" / William Heytesbury ; translated with an introduction and study by Paul Vincent Spade . - Toronto : Pontifical Institute of Mediaeval Studies, 1979 . - 111 p. 20 cm. - (Mediaeval sources in translation ; 21 )
К.: Бібліогр. : c. 97-101, Index
0-88844-270-X