από το χώρο των Μαθηματικών και την τοπική ιστορία της Θεσσαλονίκης
https://www.facebook.com/download/143155047888693/%CE%97%20%CE%B4%CE%B9%CE%B5%CE%AF%CF%83%CE%B4%CF%85%CF%83%CE%B7%20%CF%84%CF%89%CE%BD%20%CE%97%CE%BB%CE%B5%CE%BA%CF%84%CF%81%CE%BF%CE%BD%CE%B9%CE%BA%CF%8E%CE%BD%20%CE%A5%CF%80%CE%BF%CE%BB%CE%BF%CE%B3%CE%B9%CF%83%CF%84%CF%8E%CE%BD%20%CF%83%CF%84%CE%BF%20%CE%A0%CE%B1%CE%BD%CE%B5%CF%80%CE%B9%CF%83%CF%84%CE%AE%CE%BC%CE%B9%CE%BF%20%CE%98%CE%B5%CF%83%CF%83%CE%B1%CE%BB%CE%BF%CE%BD%CE%AF%CE%BA%CE%B7%CF%82.pdf?av=100003899882558&eav=AfZXnSIJBw9SHD1KjaJsrBIZuAApLxQiyv9S_y-wmKYFJUSe8-bYMBFX5X63dXu2BwQ&hash=AcoLbshbRaEjoW0uRO0&__cft__[0]=AZVTkeMUvE0YXCsYJZAVwbRQjxRrjMOo81_hVVQ22pFwaIay80FUgtiNFLBuCHpsCFiZrWKeHHM7SFmx8_4wV3XlnatfpNMqKzg3ERMXN7yOmZmwEC658DDAuHXGhpGIvQd-XCH-LH2tUez_FMO5yoZL&__tn__=H-R