@inbook {IOPORT.00475584,
    author       = {Borodin, Oleg},
    title        = {Four problems on plane graphs raised by Branko Gr\"unbaum.},
    year         = {1993},
    booktitle    = {Graph structure theory. Proceedings of the AMS-IMS-SIAM joint summer research conference on graph minors held June 22 to July 5, 1991 at the University of Washington, Seattle, WA (USA)},
    isbn         = {0-8218-5160-8},
    pages        = {149-156},
    publisher    = {Providence, RI: American Mathematical Society},
    abstract     = {Author's abstract: ``The following four problems on coloring and structure of plane graphs raised by Branko Gr\"unbaum and contributed to or solved by the author are discussed: (a) acyclic coloring, (b) the three color problem, (c) cyclic connectivity, and (d) the number of light edges.'' Light edges of a planar graph have small sums of valencies of the end- vertices.},
    reviewer     = {E.Jucovi\v{c} (Ko\v{s}ice)},
    identifier   = {00475584},
}