TY - BOOK AU - Tolstykh Vladimir A. TI - Partial differential equations: An unhurried introduction SN - 9783110677249 (pbk) U1 - B334, R0 PY - 2020/// CY - Berlin PB - De Gruyter KW - Quasilinear equations KW - Mathematics N1 - Appendix 249-262p.; Bibliography 263p.; Index 265-266p ER -