: ▁H INE ▁D . B lag o ev ▁– ▁V arna , ▁ 5 3 , ▁ 1 9 8 1 , ▁N : ▁ 4 , ▁p .   1 0 0 – 1 4 3 . ▁ ▁Typ ological ▁studies ▁in ▁economic ▁ge ography ▁and ▁their ▁application ▁in ▁teaching ▁ge ography . ▁– ▁In : ▁Training ▁in ▁Geography , ▁ 1 9 8 1 , ▁N : ▁ 5 , ▁p .   1 0 – 1 5 . ▁▁ ▁Function al ▁– ▁territorial ▁classification ▁of ▁passenger ▁Railway ▁St ations ▁in ▁Bulg aria . ▁– ▁In : ▁H INE ▁D . B lag o ev ▁– ▁V arna , ▁ 1 9 8 9 , ▁N : ▁ 2 , ▁p .   1 5 2 – 1 6 3 . ▁▁ ▁Black ▁Sea ▁– ▁area ▁specific ▁manifest ation ▁of ▁daily ▁comm ute ▁tri ps . ▁– ▁In : ▁Black ▁Sea ▁in ▁ 1 3 0 0 - year ▁history ▁of ▁Bulg aria , ▁Coll . ▁Lear n . ▁Re ports . ▁– ▁V arna : ▁Union ▁of ▁Scient ists . ▁Work ers ▁in ▁Bulg aria , ▁ 1 9 8 1 , ▁p .   2 7 3 – 2 8 7 . ▁ ▁Research es ▁▁▁ ▁( co - author ed ▁with ▁T anya ▁D abe va ▁Philipp ova , ▁Georg ina ▁Georg ie va ▁L uk an ova ) ▁Hospital ity ▁in ▁Europe ▁– ▁categories , ▁locations , ▁development . ▁V arna : ▁P H ▁Circle ,