MR0330616
Sat{\=o}, Y{\=u}kiti
Yūkiti SATŌ
Limit cycles of a certain nonlinear differential equation of the second order
Funkcialaj Ekvacioj. Serio Internacia
16
1973
53--67
http://fe.math.kobe-u.ac.jp/FE/Free/vol16/fe16-1-3.pdf
http://fe.math.kobe-u.ac.jp/FE/FE_pdf_with_bookmark/FE11-20-en_KML/fe16-053-067/fe16-053-067.pdf
http://www.ams.org/mathscinet-getitem?mr=MR0330616
fe16-053-067
1973
Limit Cycles of a Certain Nonlinear Differential Equation of the Second Order
SAT\bar{O}, Y\bar{u}kiti
SAT\bar{O}, Y\bar{u}kiti
1
Sansone, G.; Conti, R.
Non-linear differential equations
Pergamon Press
1964
MR0177153
100
Cache/Sa/Sansone,Non-linear,*,1964,1965
xiii+536
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Reissig, R.
Selbsterregung eines einfachen Schwingers
Math. Nach.
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1956
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MR0086216
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Cache/Re/Reissig,Selbsterregung,Math*,1956,1957
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Hartman, P.
Ordinary Differential Equations
John Wily & Sone
1964
MR0171038
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Cache/Ha/Hartman,Ordinary,*,1964,1965
xiv+612