J. Ridder. Die Gentzenschen Schluszverfahren in modalen Aussagenlogiken. Koninklyke Nederlandse Akademie van Wetenschappen, Proceedings, ser. A vol. 58 (1955), pp. 163–169, 170–177, 270–274, 275–276; also Indagationes mathematicae, vol. 17 (1955), pp. 163–169, 170–177, 270–274, 275–276. - K. Matsumoto, M. Ohnishi, and J. Ridder. Die Gentzenschen Schluszverfahren in modalen Aussagenlogiken. I. Koninklyke Nederlandse Akademie van Wetenschappen, Proceedings, ser. A, vol. 60 (1957), pp. 481–491; Koninklyke Nederlandse Akademie van Wetenschappen, Proceedings, ser. A, vol. 19 (1957), pp. 481–491. - J. Ridder. Die Gentzenschen Schluszverfahren in modalen Aussagenlogiken. II and III. Koninklyke Nederlandse Akademie van Wetenschappen, Proceedings, ser. A, vol. 61 (1958), pp. 16–22, and pp. 23–27; also Koninklyke Nederlandse Akademie van Wetenschappen, Proceedings, ser. A, vol. 20 (1958), pp. 16–22, and pp. 23–27.

R. Routley

doi:10.2307/2272295

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J. Ridder. Die Gentzenschen Schluszverfahren in modalen Aussagenlogiken. Koninklyke Nederlandse Akademie van Wetenschappen, Proceedings, ser. A vol. 58 (1955), pp. 163–169, 170–177, 270–274, 275–276; also Indagationes mathematicae, vol. 17 (1955), pp. 163–169, 170–177, 270–274, 275–276. - K. Matsumoto, M. Ohnishi, and J. Ridder. Die Gentzenschen Schluszverfahren in modalen Aussagenlogiken. I. Koninklyke Nederlandse Akademie van Wetenschappen, Proceedings, ser. A, vol. 60 (1957), pp. 481–491; Koninklyke Nederlandse Akademie van Wetenschappen, Proceedings, ser. A, vol. 19 (1957), pp. 481–491. - J. Ridder. Die Gentzenschen Schluszverfahren in modalen Aussagenlogiken. II and III. Koninklyke Nederlandse Akademie van Wetenschappen, Proceedings, ser. A, vol. 61 (1958), pp. 16–22, and pp. 23–27; also Koninklyke Nederlandse Akademie van Wetenschappen, Proceedings, ser. A, vol. 20 (1958), pp. 16–22, and pp. 23–27.

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J. Ridder. Die Gentzenschen Schluszverfahren in modalen Aussagenlogiken. Koninklyke Nederlandse Akademie van Wetenschappen, Proceedings, ser. A vol. 58 (1955), pp. 163–169, 170–177, 270–274, 275–276; also Indagationes mathematicae, vol. 17 (1955), pp. 163–169, 170–177, 270–274, 275–276. - K. Matsumoto, M. Ohnishi, and J. Ridder. Die Gentzenschen Schluszverfahren in modalen Aussagenlogiken. I. Koninklyke Nederlandse Akademie van Wetenschappen, Proceedings, ser. A, vol. 60 (1957), pp. 481–491; Koninklyke Nederlandse Akademie van Wetenschappen, Proceedings, ser. A, vol. 19 (1957), pp. 481–491. - J. Ridder. Die Gentzenschen Schluszverfahren in modalen Aussagenlogiken. II and III. Koninklyke Nederlandse Akademie van Wetenschappen, Proceedings, ser. A, vol. 61 (1958), pp. 16–22, and pp. 23–27; also Koninklyke Nederlandse Akademie van Wetenschappen, Proceedings, ser. A, vol. 20 (1958), pp. 16–22, and pp. 23–27.

To save this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you used this feature, you will be asked to authorise Cambridge Core to connect with your Google Drive account. Find out more about saving content to Google Drive.

J. Ridder. Die Gentzenschen Schluszverfahren in modalen Aussagenlogiken. Koninklyke Nederlandse Akademie van Wetenschappen, Proceedings, ser. A vol. 58 (1955), pp. 163–169, 170–177, 270–274, 275–276; also Indagationes mathematicae, vol. 17 (1955), pp. 163–169, 170–177, 270–274, 275–276. - K. Matsumoto, M. Ohnishi, and J. Ridder. Die Gentzenschen Schluszverfahren in modalen Aussagenlogiken. I. Koninklyke Nederlandse Akademie van Wetenschappen, Proceedings, ser. A, vol. 60 (1957), pp. 481–491; Koninklyke Nederlandse Akademie van Wetenschappen, Proceedings, ser. A, vol. 19 (1957), pp. 481–491. - J. Ridder. Die Gentzenschen Schluszverfahren in modalen Aussagenlogiken. II and III. Koninklyke Nederlandse Akademie van Wetenschappen, Proceedings, ser. A, vol. 61 (1958), pp. 16–22, and pp. 23–27; also Koninklyke Nederlandse Akademie van Wetenschappen, Proceedings, ser. A, vol. 20 (1958), pp. 16–22, and pp. 23–27.

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