^Björner, Anders, Oriented Matroids, Encyclopedia of Mathematics and Its Applications 46, Cambridge University, 1999, ISBN 978-0-521-77750-6. Page 150: "It seems fair to say that the major credit for the origination of oriented matroid theory should be shared by Robert Bland, Jon Folkman, Michel Las Vergnas, and Jim Lawrence." This authoritative reference on oriented matroids discusses Bland's pivoting-rule on page 418.