【MR(2000)】∈ http://www.ams.org/mathweb/msc2000/
【MathSci】∈ http://www.ams.org/mathscinet/
【Elsevier】∈ http://www.sciencedirect.com/
【预印本】∈ http://arXiv.org/
【SIAM】∈ http://www.siam.org/
【MathSci】∈ http://www.ams.org/mathscinet/
【Elsevier】∈ http://www.sciencedirect.com/
【预印本】∈ http://arXiv.org/
【SIAM】∈ http://www.siam.org/