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A. Grabowski, M. Jastrzębska
A note on a formal approach to rough operators
Rough Sets and Current Trends in Computing, 7th International Conference RSCTC, Jun 28-30, 2010, Warsaw, Poland, (M. Szczuka et al. Ed(s).), LNCS vol. 6086, (publ. by) Springer, 2010, pp. 307-316.
DOI:
10.1007/978-3-642-13529-3_33
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M. Jastrzębska
Representation of the Fibonacci and Lucas numbers in terms of floor and ceiling
Form. Math. 18 (2010), no. 1, 77-80.
DOI:
10.2478/v10037-010-0010-1