On some of my favourite problems in graph theory and block designs

I refer to a few of my papers which state unsolved problems.

Bibliographic Details
Main Author: Paul Erdös
Format: Article
Language:English
Published: Università degli Studi di Catania 1990-05-01
Series:Le Matematiche
Online Access:http://www.dmi.unict.it/ojs/index.php/lematematiche/article/view/659